Find the component if the Vector BC if B=(2,-7) and C= (-4,-5)

Answers

Answer 1

The component of vector BC in the direction of the x-axis is (-6, 0).

What is the component of the vector on x-axis?

To find the component of vector BC, we need to find the projection of vector BC onto a given vector.

The component of vector BC in the direction of the x-axis can be found using the formula:

comp(x) = (BC · unit(x)) · unit(x)

where;

BC is the vector from B to C, unit(x) is the unit vector in the direction of the x-axis, and comp(x) is the component of vector BC in the direction of the x-axis.

To find unit(x), we can use the following formula:

unit(x) = (1, 0)

since the x-axis is the horizontal axis and its unit vector has a horizontal component of 1 and a vertical component of 0.

Now, let's calculate the component of vector BC in the direction of the x-axis:

BC = C - B = (-4, -5) - (2, -7) = (-6, 2)

|BC| = √((-6)² + 2²)

|BC| = √(40)

unit(x) = (1, 0)

(BC · unit(x)) = (-6) · 1 + (2) · 0 = -6

comp(x) = (BC · unit(x)) · unit(x) = (-6) · (1, 0) = (-6, 0)

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The complete question is below:

Find the component of the Vector BC on x-axis, if B=(2,-7) and C= (-4,-5)


Related Questions

A chef need to 12 pound of sliced carrots. This preparation of carrots has a yield percent of 86. What he peed quantity of carrots does the chef need to pull from the walk-in?

Answers

The chef would need to pull 14.07 lb of carrots from the walk-in in order to have 12 lb of sliced carrots after preparation.

What is quantity?

Quantity is the amount or magnitude of something. It can be measured in terms of units, such as length, weight, volume, area, speed, temperature and time. Quantity also refers to the size or number of something, such as the number of items in a package or the number of people in a room. In mathematics, quantity is usually represented by a number or symbol.

In order to calculate the quantity of carrots the chef needs to pull from the walk-in, we can use the following formula:

Quantity Needed = 12 lb / 0.86 (yield percent)

Therefore, the chef would need to pull 14.07 lb of carrots from the walk-in in order to have 12 lb of sliced carrots after preparation.

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The chef would need to pull 14.07 lb of carrots from the walk-in in order to have 12 lb of sliced carrots after preparation.

What is quantity?

Quantity is the amount or magnitude of something. It can be measured in terms of units, such as length, weight, volume, area, speed, temperature and time. Quantity also refers to the size or number of something, such as the number of items in a package or the number of people in a room. In mathematics, quantity is usually represented by a number or symbol.

In order to calculate the quantity of carrots the chef needs to pull from the walk-in, we can use the following formula:

Quantity Needed = 12 lb / 0.86 (yield percent)

Therefore, the chef would need to pull 14.07 lb of carrots from the walk-in in order to have 12 lb of sliced carrots after preparation.

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Write a function rule P(m) to represent Evelyn’s profit per mask so that she can always find what her profits will be for any amount of masks (m) she sells.

Answers

By answering the presented question, we may conclude that Evelyn will equation need to sell roughly 281 masks in order to cover her initial project expenditures and begin generating a profit.

What is equation?

A math equation is a technique that links two assertions and denotes equivalence using the equals sign (=). In algebra, an equation is a mathematical statement that proves the equality of two mathematical expressions. For example, in the equation 3x + 5 = 14, the equal sign separates the numbers 3x + 5 and 14. A mathematical formula may be used to understand the link between the two phrases written on either side of a letter. The logo and the programmed are usually interchangeable. As an example, 2x - 4 equals 2.  

Initially, we must determine the entire cost of producing and transporting one mask:

Total cost per mask = $1.25 plus $2.15 for delivery = $3.40

Profit per mask is selling price minus total cost per mask, which equals $5 - $3.40 = $1.60.

As a result, Evelyn will profit $1.60 for each mask she sells. We may use the following calculation to calculate how many masks she needs to sell to recoup her $450 initial project costs:

Total beginning project expenditures / profit per mask = number of masks to sell

Total number of masks to be sold = $450 / $1.60 per mask = 281 masks

Evelyn will need to sell roughly 281 masks in order to cover her initial project expenditures and begin generating a profit.

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13 ) Skyler mows lawns in the summer. The function f(x) is used to
model the amount of money earned, where x is the number of lawns
completely mowed. A reasonable domain for this function would be
(1) real numbers
(2) rational numbers
(3) irrational numbers
(4) natural numbers

Answers

It’s #4, Natural numbers

Please help me!

Erick wants to buy a new mountain bike that costs $250.
He has already saved $120 and plans to save $20 each week
from the money he earns for mowing lawns. He thinks he
will have saved enough money after seven weeks.

A. Complete the table. Then graph the data.
Time (weeks)

0
1
2
3
Money Saved ($)

120
___
___
___

B. How can you tell that the relationship is a linear function from th
table? How can you tell from the graph?

Answers

The values that complete the table would be: $140, $160, $180, $200, $220, $240, $260. This is a linear relationship because the data on the graph would show an ascending line with a constant slope.

How to complete the table?

To complete the table we must take into account the information, in this case Erick saves $20 per week, so we would have to add $20 to his initial budget of $120 and add $20 each week. Based on this information, the data that completes this table would be:

$140, $160, $180, $200, $220, $240, $260.

What would a graph look like with this data?

The graph with this data would be a linear expression, so the line would go up from $120 to $260 constantly, with a difference of $20 each week.

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Express the perimeter of the following triangle in simplest form: 3a + 8 4a +2b + 7 5a + b​

Answers

The perimeter of the triangle when expressed in simplest form is 12a + 3b + 15

How to express the perimeter of the triangle

The dimensions of the triangle are given as

3a + 8 4a +2b + 7 5a + b​

Perimeter refers to the total length of the boundary or outer edge of a two-dimensional shape.

The perimeter is measured in linear units such as centimeters, meters, feet, or inches.

The formula for finding the perimeter of a shape depends on the type of shape

For the triangle, we have

Perimeter = 3a + 8 + 4a +2b + 7 + 5a + b​

Evaluate

Perimeter = 12a + 3b + 15

Hence, teh perimeter is 12a + 3b + 15

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What are the coordinates D1/2 (2,4) coordinates =

Answers

The cοοrdinates οf A′ fοr the dilatiοn D1.5(A) is A'(3, 6).

What are cοοrdinates?  

Cοοrdinates are a set οf numbers used tο lοcate the pοsitiοn οf a pοint οr an οbject in a space οr plane. They are typically used tο represent pοints in a Cartesian cοοrdinate system, which is a system that uses twο οr three perpendicular axes tο define the pοsitiοn οf a pοint.

Tο find the cοοrdinates οf the dilatiοn D1/2(△XYZ), we need tο multiply the cοοrdinates οf each vertex οf the triangle by the scale factοr οf 1/2. This will result in a triangle that is half the size οf the οriginal triangle, but with the same shape and prοpοrtiοns.

The given cοοrdinate is A(2, 4).

It's impοrtant tο knοw that a dilatiοn implies a bigger figure than the οriginal. In this case, we have a factοr οf dilatiοn οf 1.5, which means each cοοrdinate must be multiplied by it.

Sο, using the factοr οf dilatiοn, we have

A(2, 4) ⇒ A((2 × 1.5),(4 × 1.5)) ⇒ A'(3, 6)

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Complete question:

The point A has coordinates A(2, 4). What are the coordinates of A′ for the dilation D1.5(A)?

Evaluate the following using Cauchy Integral Theorem; The integral of 3z+1/(z(z-2)^2)

Answers

Hence, in response to the provided question, we can say that As a result, derivatives the integral has a value of -i/2.

what is derivative?

In mathematics, the derivative of a function with real variables measures how sensitively the function's value changes in reaction to changes in its parameters. Derivatives are the fundamental tools of calculus. Differentiation (the rate of change of a function with respect to a variable in mathematics) (in mathematics, the rate of change of a function with respect to a variable). The use of derivatives is essential in the solution of calculus and differential equation problems. The definition of "derivative" or "taking a derivative" in calculus is finding the "slope" of a certain function. einsteinerupload of. Derivatives are rate of change metrics that apply to almost any function.

To use the Cauchy Integral Theorem to evaluate the integral (3z+1)/(z(z-2)2), we must first determine whether the function has any singularities in the region we are integrating across.

We can write the function to find the residue at z=0 as:

A/z + B/(z-2) + C/(z-2)2 = (3z+1)/(z(z-2)2)

3z+1 = A(z-2)^2 + Bz(z-2) + Cz

When we set z=0, we get:

1 = 4A

So, A = 1/4.

Set z=2 in the following equation and its derivative to determine B and C:

9 = 4B + 2C

3 = 4A - 2B - C

B = -1/2 and C = 7/4.

So, A=1/4 is the remnant at z=0, while B=-1/2 is the residue at z=2.

Applying the residue theorem, the integral is as follows:

dz = 2i [Res(z=0) + Res(z=2)] = 3z+1/(z(z-2)2

= 2πi [1/4 - 1/2]

= -πi/2.

As a result, the integral has a value of -i/2.

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Use set-builder notation to indicate set numbers as described.
Answer
4
The set of all real numbers between 1 and 3, including 1

Answers

The set of all real numbers between 1 and 3, including 1 can be represented using set-builder notation as: { x ∈ R | 1 ≤ x ≤ 3 }

set-builder notation:

{ x ∈ R | 1 ≤ x ≤ 3 }

"The set of all x in the set of real numbers such that x is bigger than or equal to 1 and less than or equal to 3" can be understood from this notation. The word "such that" is denoted by the vertical bar "|," and the condition that follows lists the requirements that each element of the set must meet.

When the criteria is "more than or equal to 1" in this instance, the set contains 1. As they also meet the requirement of being "less than or equal to 3," the set also includes all real numbers between 1 and 3. Observe that no numbers outside of the range [1,3] are included in the collection.

In conclusion, the set of all real numbers between 1 and 3, including 1, may be written as x R | 1 x 3 in set-builder notation.

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Saima wants to put a lace on the edge of a circular table cover of diameter 1.5 m. Find the length of the lace required and also find its cost if one meter of the lace costs 15. (Take p = 3.14). (show working too) stop copying from others

Answers

The required length of lace = 4.17m and the cos for lace of 4.17m is ₹ 70.65.

[tex]\text{Circumference of the circle}=2\pi r[/tex][tex]\text{Radius of circle}=\dfrac{\text{diameter}}{2}[/tex]

Step 1:

Find the radius, r of the circular table.

Given that, Salma wants to put a lace on the edge of a circular table of diameter

Diameter of circle, d=1.5m

Radius of circle, [tex]\text{r}=\dfrac{1.5}{2}\text{m}[/tex]

Step 2:

Find circumference of the circle.

Substitute [tex]\text{r}=\dfrac{1.5}{2}\text{m}[/tex] in formula

[tex]\text{Circumference of the circle}=2\pi r[/tex]

Take [tex]\pi =3.14[/tex]

[tex]=2\times3.14\times\dfrac{1.5}{2}[/tex]

[tex]=3.14\times1.5[/tex]

[tex]=4.71 \ \text{m}[/tex]

[tex]\text{Circumference of circle} = 4.71 \ \text{m}[/tex]

[tex]\text{The length of lace required is 4.71} \ \text{m}[/tex]

Step 3:

Find the cost of rope.

From step 2

[tex]\text{Length of lace required} =\it{4.17} \ \text{m}[/tex]

Given that, of the lace costs ₹ 15

From the above statement, form an equation.

Cost of 1m lace = ₹ 15

Therefore, cost of 4.17m lace

Required length of lace = 4.17m. Cost for lace of 4.17m is₹ 70.65.

Where is there a striking deviation in the dot plot above

Answers

The is a striking deviation at the value of 5.5.

This deviation is seen in the form of a cluster of dots that are significantly higher than the rest of the data points. This cluster of dots represents a group of observations that share a similar characteristic or variable that sets them apart from the rest of the data set.
The presence of this deviation at the value of 5.5 indicates that there is a unique factor or characteristic present in this group of observations that is not shared by the rest of the data set. This could be due to a number of factors, such as a different population, different data collection methods, or even measurement error.
It is important to note this deviation when analyzing the data set, as it can have a significant impact on any conclusions drawn from the data.

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pls help! show work! ​

Answers

Answer:

6 cm

Step-by-step explanation:

Volume of the given cylinder is calculated using the formula
V = π r ² l

r = radius of the cylinder = diameter/2

Here r = 4/2 = 2 cm

V = 150 cm³

and we are asked to calculate l

Plugging in known values
150 = π · 2³ · l

switch side:
π · 2³ · l = 150

π · 8 · l = 150

l = 150/8π

= 5.96831 cm

To the nearest centimeter we would round this up to 6 cm (Answer)

Which graph shows the solution to the system of linear equations? y= 2x y=X- 2​

Answers

Answer:

(-2, -4)

Step-by-step explanation:

Systems of equations are sets of two or more equations that share the same variables.

Graphing

To graph a system of equations, simply graph each line individually. Both of the equations given are linear. Attached is a graph of both equations. As you can see the graphs intersect at (-2, -4).

Solutions to Systems of Equations

The solution to a system of linear equations is the coordinate point that the lines intersect. This is the point where the x and y-values make both equations true. To check the answer, plug the values into the equations. If both remain true, the answer is correct.

First, y = 2x

-4 = 2(-2)-4 = -4

This is true. Next, y = x - 2

-4 = -2 - 2-4 = -4

This is also true; thus the answer is (-2, -4).

I will mark you brainiest!

The sum of the interior angles of an octagon is:
A) 1080º.
B) 180º.
C) 360º.
D) 720º.

Answers

Answer:

A) 1080º

Step-by-step explanation:

I remember learning this in math class. The octagon has 8 interior angles and 8 exteriors angle. The sum of the interior angles of an octagon is 1080º

Answer:

The sum of the interior angles of an octagon can be found using the formula: (n-2) x 180 degrees, where n is the number of sides of the polygon.

For an octagon, n = 8, so the sum of the interior angles is (8-2) x 180 = 6 x 180 = 1080 degrees.

Therefore, the correct answer is A) 1080º.

What is the area of the triangle in the coordinate plane?

(A) 36 units²

(B) 38 units²

(C) 66 units²

(D) 72 units²
_______________________________
(reporting wrong/spam answers)
(giving brainliest to correct answers)
_______________________________

Answers

The answer should be 36 units squared.

Area of a triangle = 1/2(bh)

base = 11-3 = 8
height = 12-3 = 9

9 • 8 = 72

72/2 = 36

The area of the triangle in this coordinate plane will be 36 square units. Then the correct option is A.

What is the area of the triangle?

Assume 'h' is the height of the triangle and 'b' be the base of the triangle. Then the area of the triangle is given as,

[tex]\text{A} = (\dfrac{1}{2} ) \times h\times b[/tex]

From the graph, the length of the height of the triangle is 9 units and the length of the base of the triangle is 8 units. Then the area is given as,

[tex]\text{A} = (\dfrac{1}{2} ) \times 9\times 8[/tex]

[tex]\text{A = 36 square units}[/tex]

The area of the triangle in this coordinate plane will be 36 square units. Then the correct option is A.

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n 8.1 Homework
K
Part 1 of 2
Suppose that the local sales tax rate is 3% and you purchase a car for $21,100.
a. How much tax is paid?
b. What is the car's total cost?

Answers

This same car's purchase amount, which would include tax, is $21,733.

Which tax is this?

A tax is a compulsory fee / financial charge imposed by a government on a person or an entity in order to raise money for public works projects that provide the greatest infrastructure and facilities.

a. To determine the amount of tax paid, multiply the cost of the car even by applicable sales tax rate.

3% times $21,100 is the amount of tax paid.

Taxes paid = 0.03 times $21,100.

Total tax paid: $633

Hence, $633 in taxes were paid on the vehicle.

b. To get the entire cost of the vehicle, we must add the purchase price and any applicable taxes:

Total price equals automobile price plus tax paid.

Cost in total is $21,100 plus $633.

Cost in total is $21,733

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Based on historical data, it takes students an average of 48 minutes with a standard deviation of 15 ninutes to complete the Unit 5 test. What is the probability that your class of 20 students will have a mean Completion time greater than 60 minutes on the Unit test?

Answers

The probability that your class of 20 students will have a mean completion time greater than 60 minutes on the unit test is very low.

What is probability ?

Probability cam be defined as ratio of number of  favorable outcomes, total number of outcomes

We can solve this problem by using the central limit theorem. According to the theorem, if we have a large enough sample size, the distribution of sample means will be approximately normal, regardless of the underlying distribution of the population.

The mean of the sample means will be equal to the population mean, and the standard deviation of the sample means (also known as the standard error) will be equal to the population standard deviation divided by the square root of the sample size.

In this case, we have a sample size of 20, which is not very large, but we can still use the central limit theorem as an approximation. The population mean is 48 minutes, and the population standard deviation is 15 minutes. The standard error of the sample mean is:

SE = σ / sqrt(n) = 15 / sqrt(20) = 3.354

To find the probability that the mean completion time for the sample is greater than 60 minutes, we need to standardize the sample mean using the formula:

z = (x - μ) / SE

where x is the sample mean, μ is the population mean, and SE is the standard error of the sample mean.

Plugging in the values, we get:

z = (60 - 48) / 3.354 = 3.57

We can now look up the probability of getting a z-score greater than 3.57 in a standard normal distribution table (or use a calculator). The probability turns out to be very small, approximately 0.0002 or 0.02%.

Therefore, the probability that your class of 20 students will have a mean completion time greater than 60 minutes on the unit test is very low.

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What is the domain of the function

Answers

Answer: x[tex]\neq[/tex]6

Step-by-step explanation

The inverse function is f^-1(x)=1/x-4+6  and the domain is x[tex]\neq[/tex]6

Express f(x) as y

Swap the positions of x and y

Add 6 to both sides

Multiply both sides by y-4

Divide both sides by x + 6

Add 4 to both sides

Rewrite as: f-1(x)=1/x+6-4

Hence, the inverse function is 4  and the domain is x[tex]\neq[/tex]6

URGENT ! 100 POINTS !

Mali is preparing for a competition that involves running and biking. This past weekend, they ran and biked for a total of 34 miles in 3.5 hours. Their average speed
for running was 6mph, and for biking it was 12.5mph.

If "x" represents the total hours Mali ran, and "y" represents the total hours Mali biked....

Which equation is a representation of the TOTAL TIME Mali spent training?

A. x+y = 3.5

B. 6x +12.5y = 34(3.5)

C. 6x +12.5y = 3.5

D. x+y=34

E. 12.5x+6y= 3.5

Answers

A. x + y = 3.5 equation is a representation of the TOTAL TIME Mali spent training

What is distance?

An amοunt οf space between twο things οr peοple

The tοtal distance Mali cοvered can be expressed as the sum οf the distance run and the distance biked, which is equal tο 34 miles:

distance run + distance biked = 34

We can express the distance run and the distance biked in terms οf their speeds and the time spent running and biking, respectively:

distance run = 6x (where x is the time spent running in hοurs)

distance biked = 12.5y (where y is the time spent biking in hοurs)

Using the fοrmula distance = rate × time, we can write twο equatiοns fοr the time Mali spent running and biking:

6x + 12.5y = 34 (tοtal time equatiοn)

x + y = 3.5 (tοtal time equatiοn)

Optiοn A, x + y = 3.5, is a representatiοn οf the tοtal time Mali spent training, but οptiοn B, 6x + 12.5y = 34(3.5), is nοt a representatiοn οf the tοtal time Mali spent training, but rather a representatiοn οf the tοtal distance cοvered by Mali in terms οf their speeds and time spent training. Optiοns C, D, and E are nοt cοrrect representatiοns οf the tοtal time Mali spent training either. Therefοre, the cοrrect answer is:

A. x+y = 3.5

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A consulting company has a project to launch, Project MI, and two potential consultants that will take over the project as project leaders, Jim and Joe. The project will succeed with probability 0.8 if Jim is the project leader, and with probability 0.6 if Joe is the project leader. The manager of the company said that Jim or Joe would lead the project with probabilities 0.4 and 0.6, respectively. Two months later, we have been told that the project has succeeded. What is the probability that Jim was the project leader?

Answers

Answer:

Jim was the project leader given that the project has succeeded is approximately 0.57.

Find the value of x. (Pic)

Answers

x=122
x+101+79+58=360
x=360-101-79-58
x=122

122°

Step-by-step explanation:

the formula is (n-2)180

n = the number of sides of a polygon

in this case (n-2)180;

=(4-2)180

=(2)180

=360 the total interior angle

add everything and minus them with the total interior angle to get your answer

The speed limit is 50miles per hour. Kyle driving to a baseball game that starts in 2 hours. Kyle is 130 miles away from the baseball field. If Kyle drives at the speed limit, will he arrive in time

Answers

Answer:

To determine whether Kyle will arrive in time for the baseball game, we need to calculate how long it will take him to travel the 130 miles to the baseball field.

Using the formula:

distance = rate × time

We can rearrange the formula to solve for time:

time = distance / rate

Plugging in the given values, we get:

time = 130 miles / 50 miles per hour

time = 2.6 hours

This means that it will take Kyle 2.6 hours to travel the 130 miles to the baseball field at the speed limit of 50 miles per hour.

Since Kyle has 2 hours to get to the baseball game, he will not arrive in time if he drives at the speed limit. He would need to drive faster than the speed limit to make it to the game on time. However, it's important to note that speeding is illegal and dangerous, so Kyle should not exceed the speed limit. He may need to consider leaving earlier or finding alternative transportation to ensure that he arrives at the baseball game on time.

Step-by-step explanation:

Calculus(Question in picture)

Answers

The percentage error in the volume calculation is estimated to be 24%.

What is the percentage error?

The formula for the volume of a sphere is V = (4/3)πr³

where;

r is the radius of the sphere.

Since the diameter is given as 50 ± 4 cm, the radius can be calculated as:

r = (1/2)d = (1/2)(50 ± 4) cm = 25 ± 2 cm

The percentage error in the radius is:

Δr/r = (2 cm) / (25 cm) = 0.08

This means that the radius measurement has an error of 8%.

Using the formula for the volume of a sphere, we can calculate the volume as:

V = (4/3)π(25 ± 2)³ = (4/3)π(27 ± 18) × 10³ cm³

The percentage error in the volume calculation can be found by:

ΔV/V = (Δr/r) × 3

ΔV/V = 0.08 × 3 = 0.24 = 24%

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Which of the following measurements could be the side lengths of a right triangle?

A.
24 in, 32 in, 40 in
B.
24 in, 36 in, 40 in
C.
24 in, 32 in, 48 in
D.
20 in, 32 in, 40 in

Answers

A. 24 in, 32 in, 40 in could be the side lengths of a right triangle. These measurements satisfy the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the lengths of the other two sides. In this case, 24^2 + 32^2 = 576 + 1024 = 1600, and 40^2 = 1600, so the measurements form a right triangle.

Answer:

A. 24 in, 32 in, 40 in

Step-by-step explanation:

To determine whether a set of measurements could be the side lengths of a right triangle, we can use the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) equals the sum of the squares of the lengths of the other two sides.

Using this theorem, we can check each set of measurements:

A. 24 in, 32 in, 40 in

Here, 40 in is the longest side, so it could be the hypotenuse. If we square the other two sides and add them together, we get:

24^2 + 32^2 = 576 + 1024 = 1600

And if we square the length of the hypotenuse, we get:

40^2 = 1600

So this set of measurements satisfies the Pythagorean theorem and could be the side lengths of a right triangle.

B. 24 in, 36 in, 40 in

Again, 40 in is the longest side and could be the hypotenuse. Squaring and adding the other two sides gives:

24^2 + 36^2 = 576 + 1296 = 1872

And squaring the length of the hypotenuse gives:

40^2 = 1600

So this set of measurements does not satisfy the Pythagorean theorem and cannot be the side lengths of a right triangle.

C. 24 in, 32 in, 48 in

Here, again, we can take 48 in as the hypotenuse. Squaring and adding the other two sides gives:

24^2 + 32^2 = 576 + 1024 = 1600

And squaring the length of the hypotenuse gives:

48^2 = 2304

So this set of measurements does not satisfy the Pythagorean theorem and cannot be the side lengths of a right triangle.

D. 20 in, 32 in, 40 in

Once more, we can take 40 in as the hypotenuse. Squaring and adding the other two sides gives:

20^2 + 32^2 = 400 + 1024 = 1424

And squaring the length of the hypotenuse gives:

40^2 = 1600

So this set of measurements does not satisfy the Pythagorean theorem and cannot be the side lengths of a right triangle.

In conclusion:

A set of measurements that could be side lengths of a right triangle is A) {24in,32in,40in}. The other sets do not satisfy Pythagorean theorem and cannot be sides of a right triangle.

23. If point P (4,11) is reflected across the line y = 1, what are the coordinates of its reflection image?

Answers

Answer:

b

Step-by-step explanation:

The coordinates of its reflection are (4, -10)

What is Reflection of a point?

A reflection over line is a transformation in which each point of the original figure (the pre-image) has an image that is the same distance from the reflection line as the original point, but is on the opposite side of the line.

Given that point P(4,11) is reflected across the line y=1,

Point P is on x = 4 which will not change after reflection, P is 10 units above line y = 3 so counting down 10 from y = 1, and then we will get on

y = -5'

Hence, the coordinates of reflection of point P = (4, -10)

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The sum of two numbers is 8. The larger number is 23 more than twice the smaller.

Answers

Answer:

-5 and 13.

Step-by-step explanation:

We will kick off by calling the first unknown x.

To get the expression for the larger number:

'23 more than twice the smaller number'

twice the smaller number (x) = 2x.

Thus, the bigger number = 2x+23.

We were told that the sum of these two = 8

Therefore,

x+2x+23=8

=> 3x+23=8

3x=-15

x = -5 (smaller number).

The larger number is 2x+23

= 2(-5) + 23

= 13.

Hope this helps! :)

Some researchers claim there is an association between taking vitamins and gaining weight. They took a random sample of people living in Boston, Massachusetts, and recorded whether they took vitamins and whether they gained weight. The results are shown in the following two-way table:

A student reading the results stated that more than half of the study participants are taking vitamins. Determine if the student is correct.

A) Yes, because 23.5% take one vitamin and 48.2% take more than one vitamin, which is a total of 71.7% taking vitamins.
B)Yes, because 27.4% take one vitamin and 49.5% take more than one vitamin, which is a total of 76.9% taking vitamins.
C) No, because 11.4% take one vitamin and 23.5% take more than one vitamin, which is a total of 34.9% taking vitamins.
D) No, because 16% take one vitamin and 26% take more than one vitamin, which is a total of 42% taking vitamins.

Answers

Option D is correct as 16% and 26% results in a percentage of 42%, in line with percentages in the "At least one vitamin" row of the table of random sample.

In random sample:

The student is incorrect. To determine the proportion of participants taking vitamins, we need to add up the percentages in the "At least one vitamin" row of the table. Adding 23.5% and 48.2%, we get a total of 71.7%, which is not more than half. Therefore, option A is incorrect.

Option B is also incorrect, as adding 27.4% and 49.5% gives a total of 76.9%, which is more than half but does not match the percentages in the table.

Option C is incorrect, as adding 11.4% and 23.5% gives a total of 34.9%, which is lower than the percentages in the table.

Option D is correct, as adding 16% and 26% gives a total of 42%, which matches the percentages in the "At least one vitamin" row of the table. Therefore, the correct answer is D.


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A passenger train has tickets available for 12 window seats and 8 aisle seats. The next person to buy a ticket will be randomly selected to one of those seats. What is the probability that the next passenger will be assigned to an aisle seat?

Answers

The answer is 2/5.

There is an 8/20 chance that the next person will receive a window seat. You simplify that probability to get your answer. 8/20 becomes 2/5. So the answer is 2/5.

Find an equation for the graph.

Answers

Answer:

y=4sin(1/2πx)

Step-by-step explanation:

A = 4

Period for y=sin(x) is 2pi

Since the graph shows the period is 4. Then b must be 1/2pi

-5yz + yz +2yz simplify these expressions​

Answers

Answer:

-2yz

Step-by-step explanation:

To simplify the expression -5yz + yz + 2yz, we can combine the yz terms that have the same coefficient:

-5yz + yz + 2yz = (-5 + 1 + 2)yz

Simplifying the coefficients gives:

= -2yz

Therefore, the simplified expression is -2yz.

Answer:

[tex]-2yz[/tex]

Step-by-step explanation:

[tex]-5yz + yz + 2yz = (-5 + 1 + 2)yz[/tex]

[tex](-5 + 1 + 2)yz = -2yz[/tex]

Therefore, the simplified expression is:

[tex]-2yz[/tex]

Select the graph that correctly represents ƒ(x) = 1∕2(x – 3)^2 – 6.

Answers

Option (b) correctly represent the graph f(x) = 1/2 (x-3)² -6, we can find by coordinate geometry.

What is Coordinate geometry?

A coordinate system in geometry is a method for    determining the precise location    of points or other    geometrical objects on a manifold, such as Euclidean space, using one (1) or more    numbers, or coordinates.

In coordinate geometry, many geometric figures    are described using graphs and coordinates. The    coordinate plane must be described in a definition of coordinate geometry. The     intersection of 2 number lines, referred to as axes,     yields the coordinate plane, also known as the coordinate graph, which is a grid system.

In option (b), if we    put x = 7 , we get y = 2.

and , if we    put x =4, we get y = -5.5

Hence, the option (b) is correct.

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