One example of a nonempty subset u of R^2 such that u is closed under scalar multiplication, but u is not a subspace of R^2, is the set u = {(x, y) | x, y are rational numbers}.
This set is closed under scalar multiplication as if a and (x,y) are in u, a*(x,y) will also be in u because rational numbers are closed under multiplication.
A subset can be described with different properties, one of them is closure, a subset U is closed under an operation if the operation is applied to any two elements of U, and the result is also an element of U.
In mathematics, a subset is a set that is completely contained within another set. It is defined as a set U that is a part of a set S, such that every element of U is also an element of S. The notation used to indicate that U is a subset of S is U ⊆ S.
However, this set u is not a subspace of R^2 because it doesn't contain the zero vector (0,0) and it doesn't close under addition, as the sum of two rational numbers may not be a rational number.
Therefore, One example of a nonempty subset u of R^2 such that u is closed under scalar multiplication, but u is not a subspace of R^2, is the set u = {(x, y) | x, y are rational numbers}.
To know more about subsets refer to:
brainly.com/question/23454979
#SPJ4
Mikhail wants to invest $3,800.00 in a savings account. Determine the simple interest rate required for Mikhail's investment to grow to $11,500.00 in 20 years.
The simple interest rate for Mikhail's investment to grow to $11,500.00 in 20 years is solved to be 10.13%
How to find the simple interest rateThe rate for the simple interest tis calculated using the formula for simple interest.
The formula is stated as
Simple interest = Principal * time * rate / 100
In the problem the give data include
principal = $3,800.00
rate = ?
time = 20 years
simple interest = $11,500.00 - $3,800.00 = $7700
plugging in the values
Simple interest = Principal * time * rate / 100
7700 = 3800 * 20 * r / 100
7700 * 100 = 3800 * 20 * r
770 000 / (3800 * 20 ) = r
r = 10.13%
The interest rate is 10.13%
Learn more on simple interest at:
https://brainly.com/question/29785550
#SPJ1
help me answer this pls
The value of x is 17. The solution has been obtained using mid-point theorem of triangle.
What is mid-point theorem of triangle?
The midpoint theorem states, "The line segment of a triangle joining the midpoint of any two sides of the triangle is said to be parallel to its third side and is also half of its length."
Let the triangle be ABC and the line dividing it be PQ
We are given AP = PB and AQ = QC
Now, as per mid-point theorem, PQ is parallel to BC and is also half of its length as the two sides are equal.
Therefore,
x= 34/2
x=17
Hence, the value of x is 17.
Learn more about mid-point theorem from the given link
https://brainly.com/question/30242632
#SPJ1
Please help / por favor ayuda lo necesito para ahora
The value of the angles that are in the triangle will be 97°, 51° and 32°.
How to calculate the triangle?The first thing to note before solving the question is that the sum of the total angles that are in a triangle is 180°.
In this case, it should be noted that the angles that are given are represented by variables. Therefore, we'll add them together and equate them to 180°. This will be:
18x + 7 + 8x + 11 + 6x + 2 = 180
32x + 20 = 180
Collect the like terms
32x = 180 - 20
32x = 160
Divide
x = 160 / 32
x = 5
First angle = 18x + 7
= 18(5) + 7
= 97°
Second angle = 8x + 11
= 8(5) + 11
= 51°
Third angle = 6x + 2
= 6(5) + 2
= 32°
Learn more about triangles on
brainly.com/question/17335144
#SPJ1
the population p of rabbits on a small island grows at a rate that is jointly proportional to the size of the rabbit population and the difference between the rabbit population and the carrying capacity of the population. if the carrying capacity of the population is 2400 rabbits, which of the following differential equations best models the growth rate of the rabbit population with respect to time t , where k is a constant? (A) = 2400 - kps
(B) = k (2400 – P)
(C) = k 1/p (2400 – P)
(D) = XP (2400 - P)
The differential equation that best models the growth rate of the rabbit population with respect to time t, where k is a constant is option D) [tex]\frac{dP}{dT}=KP(2400-P)[/tex].
A differential equation is an equation that relates a function and its derivatives to some independent variables. The solution to a differential equation is a function that satisfies the equation and is often used to model physical processes.
Differential equations come in many forms, including ordinary differential equations (ODEs) and partial differential equations (PDEs).
For the population in function of the time, is:
[tex]\frac{dP}{dT}[/tex]
The population P of rabbits on a small island grows at a rate that is jointly proportional to the size of the rabbit population and the difference between the rabbit population and the carrying capacity of the population
Carrying capacity is 2400.
This means that the differential equation is kP(size of the population multiplied by the constant) multiplied by 2400 - P(difference between the population and the carrying capacity).
=> [tex]\frac{dP}{dT}=KP(2400-P)[/tex]
Therefore, The differential equation that best models the growth rate of the rabbit population with respect to time t, where k is a constant is option D) [tex]\frac{dP}{dT}=KP(2400-P)[/tex].
To know more about differential equations refer to:
brainly.com/question/14620493
#SPJ4
a certain skin cream is 80 percent effective in curing a common rash. a random sample of 100 people with the rash will use the cream. which of the following is the best description of the shape of the sampling distribution of the sample proportion of those who will be cured? А Bimodal B Uniform SO с Approximately normal D Strongly skewed to the left E) Strongly skewed to the right
The sampling distribution of the sample proportion of those who will be cured is approximately normal.
In math the term called sampling distribution is defined as the sample proportion of those who will be cured with the skin cream is approximately normal.
Here we have know that a certain skin cream is 80 percent effective in curing a common rash and a random sample of 100 people with the rash will use the cream.
Here we all know that the sampling distribution is the distribution of a statistic calculated from a random sample of data.
Here we also know that the statistic is the sample proportion of those who will be cured with the skin cream.
And as per the Central Limit Theorem states that the sampling distribution of a statistic will be approximately normal if the sample size is large enough, then the shape of the underlying distribution.
Here we have given that the sample size of 100 people is large enough, then the sampling distribution of the sample proportion of those who will be cured with the skin cream is approximately normal.
Therefore, the correct option is (c) .
To know more about sampling distribution here.
https://brainly.com/question/13501743
#SPJ4
Using letter grades (A, B, C, D, and E) to classify student performance on an exam is an example of measurement on a(n) _______ scale of measurement.a) ratiob) ordinal c) nominal d) interval
A ratio scale is used for measurements that have both a meaningful zero point and also an equal interval between each point. An ordinal scale is used for measurements that rank order items from highest to lowest. A nominal scale is used for measurements that have categories without any order. An interval scale is used for measurements that have an equal interval between each point but do not have a meaningful zero point.
A ratio scale is used for measurements that have both a meaningful zero point and also an equal interval between each point. It is often used for measurements that involve numbers, such as temperature or length. An ordinal scale is used for measurements that rank order items from highest to lowest. This type of measurement can be used to classify student performance on an exam, such as with letter grades (A, B, C, D, and E). A nominal scale is used for measurements that have categories without any order. This is typically used for measurements that involve assigning names or labels to categories, such as gender or ethnicity. An interval scale is used for measurements that have an equal interval between each point but do not have a meaningful zero point. This type of measurement is often used for measurements that involve numbers, such as temperature or time. In this example of classifying student performance on an exam, the ordinal scale is the most appropriate measurement to use.
Learn more about ratio here
https://brainly.com/question/13419413
#SPJ4
A gamer is observing her score, y, as she plays a video game. She currently has 2,300 points and is gaining 100 points for every minute, x, she plays.
Which of the following equations can be used to describe this linear relationship?
y = 2,300x − 100
y = 2,300x + 100
y = 100x − 2,300
y = 100x + 2,300
Answer: The bottom one
Step-by-step explanation:
cause ur adding on to the score
Answer:
The answer is the last one
Step-by-step explanation:
The classic tradeoff between "guns and butter" states that when a society spends more on national defense, it has less to spend on consumer goods to raise the standard of living.
a. True
b. False
True, the classic tradeoff between "guns and butter" states that when a society spends more on national defense, it has less to spend on consumer goods to raise the standard of living.
The production possibility curve, which illustrates the concept of opportunity cost, has a famous economic example known as the "guns-and-butter" curve. One must decide how much of each good to create in a hypothetical economy with only two goods.
An economy must decrease its production of butter (food) as it increases its production of firearms (military spending), and vice versa. According to the guns-and-butter curve, you can only acquire something if you offer something else in exchange.
To learn more about spends here:
https://brainly.com/question/27266504
#SPJ4
The figure shows a parallelogram inside a rectangle outline:
A parallelogram is shown within a rectangle. The length of the rectangle is 3 over 5 foot, and the width of the rectangle is 2 over 5 foot. The two equal bases of the triangles outside the parallelogram are labeled 1 over 5 foot.
What is the area of the parallelogram? (1 point)
1 over 25 square foot
11 over 25 square foot
3 over 25 square foot
4 over 25 square foot
The area of the parallelogram is equal to: D. 4 over 25 square foot.
How to calculate the area of a parallelogram?Mathematically, the area of a parallelogram can be calculated by using this formula:
Area of a parallelogram = b × h
Where:
b represents the base area of a parallelogram.h represents the height of a parallelogram.Based on the information provided above, the actual base of the parallelogram is given by:
Actual base of parallelogram = 3/5 - 1/5
Actual base of parallelogram = 2/5 foot.
Substituting the given parameters into the area of a parallelogram formula, we have the following;
Area of a parallelogram = 2/5 × 2/5
Area of a parallelogram = 4/25 square foot.
Read more on area of a parallelogram here: https://brainly.com/question/10748788
#SPJ1
Need help with this work
The required statistical parameters has been computed as follows:
Range = 17.
Standard deviation, SD = 6.87.
How to calculate the range?Mathematically, the range of a data set can be calculated by using this formula;
Range = Highest number - Lowest number
Range = 25 - 8
Range = 17.
How to calculate the mean?Mathematically, the mean for these set of data would be calculated by using this formula:
Mean = [F(x)]/n
F(x) = 11 + 8 + 5 + 11 + 25
F(x) = 60.
Mean = 60/5
Mean = 12
Next, we would calculate the standard deviation by using this formula:
SD = √(1/n × ∑(xi - u₁)²)
SD = √(1/5 × (11 - 12)² + (8 - 12)² + (5 - 12)² + (11 - 12)² + (25 - 12)²)
SD = √(1/5 × (1 + 16 + 49 + 1 + 169)
SD = √(1/5 × 236)
Standard deviation, SD = 6.87.
Read more on standard deviation here: brainly.com/question/14467769
#SPJ1
A total of $6000 was invested, part of it at 7% interest and the remainder at 8%. If the total yearly interest amounted to $460, how much was invested at each?
The investment amount at each is $2000 at 7% interest and the $4000 remainder at 8%.
What is the system of equations?One or many equations having the same number of unknowns that can be solved simultaneously called as simultaneous equation. And simultaneous equation is the system of equation.
Given:
A total of $6000 was invested,
part of it at 7% interest and the remainder at 8%.
The total yearly interest amounted to $460.
That means,
we have the system of equations,
x + y = 6000 {equation 1}
0.07x + 0.08y = 460 {equation 2}
Substituting the value of y to the equation 2,
0.07x + 0.08(6000-x) = 460
480 - 0.01x = 460
-0.01x = 460 -480
0.01x = 20
x = 2000
And y = 4000
Therefore, 2000 in 1st account and 4000 in 2nd account.
To learn more about the system of equation;
brainly.com/question/13729904
#SPJ1
grayson lives and works in indiana, which has a flat state income tax of 3.4% of his annual salary is 49,255$ and he gets paid once a month, how much is withheld from his gross income for state income tax each pay period
Answer:
Step-by-step explanation:
49255-1674.67=47580.33
Dante wants to spend some of his allowance money, but he is having a hard time deciding what to buy. He loves baseball cards, packs of gum, and bouncy balls. Fill in the ratio tables and answer the questions to help Dante keep track of what he can buy C 1 Dante's favorite packs of baseball cards cost $1.70 each. Fill in the table below to show the cost of different numbers of packs of baseball cards. 10 Packs of Baseball Cards Cost Packs of Gum Cost Packs of Bouncy Balls Cost 1 $1.70 $0.60 1 2 Dante's favorite gum costs $0 60 a pack. Fill in the table below to show the cost of different numbers of packs of gum. J 2 5 $3.15 2 2 4 3 8 9 6 3 Bouncy balls come in packages that cost $3.15 each. Fill in the table below to show the cost of different numbers of packs of bouncy balls. 10 9 19 b Can he buy 30 packs of gum? Why or why not? 15 10 20 25 12 25 4 Dante decided to spend only $20.00 of his allowance and save the rest for later. a Can he buy 12 packs of baseball cards? Why or why not? 20 How much of the $20.00 will he still have after he buys 5 packs of bouncy balls?
Answer:
Step-by-step explanation:
a. No, he can't buy 12 packs of baseball cards because 12 packs * $1.70/pack = $20.40, which is more than $20.
b. Yes, he can buy 30 packs of gum because 30 packs * $0.60/pack = $18.00, which is less than or equal to $20.
c. He will still have $6.75 after he buys 5 packs of bouncy balls because $20.00 - (5 packs * $3.15/pack) = $20.00 - $15.75 = $6.75
In the table you provided, you can see the cost of different numbers of packs of baseball cards, gum and bouncy balls. This can help Dante to decide how much to spend on each item and how much he will save.
(t-2)(t+5) = t-2 (t+5) describe and correct the error in finding the product of the binomials
In the given expression, t-2 (t+5) is incorrect. The correct expression is (t-2)(t+5) = t² + 3t - 10. The error in the original expression is that it is not using the distributive property. The correct way to find the product is by using either distributive property or FOIL method.
How to explain the expression?The expression (t-2)(t+5) is the product of two binomials. To find the product, we use the distributive property and the FOIL method. The distributive property states that for any two binomials (a+b)(c+d) = ac + ad + bc + bd.
The FOIL method stands for "first, outer, inner, last", and is a mnemonic for the distributive property. To use the FOIL method, we take the first term from the first binomial, the second term from the second binomial, the second term from the first binomial, and the last term from the second binomial.
In your original expression, the error is that there is no operator between the two binomials (t-2) and (t+5), which makes it unclear whether you are trying to multiply them or not. To correct this, you need to add the multiplication operator () between the two binomials, so it becomes (t-2)(t+5).
Learn more about binomial on:
https://brainly.com/question/9325204
#SPJ1
If 0= 27°, find the distance between two cities, A and B, to
the nearest mile. The radius of the Earth is approximately
4000 miles.
The distance between two cities, A and B is 1884 miles. The solution has been obtained using the concept of arc of circle.
What is arc of circle?
A circle's arc is referred to as a section or portion of its circumference. A chord of a circle is a straight line that can be created by joining the arc's two ends. A semicircular arc is one whose length is exactly half that of the circle.
We are given that the angle is 27° and radius is 4000 miles
We know that circumference of circle = 2πr
So,
C=2*3.14*4000
C= 25120
Now, to find the length of arc AB,
⇒Arc length = (27° × 25120)/360°
⇒Arc length = 1884
Hence, the distance between two cities, A and B is 1884 miles.
Learn more about arc of circle from the given link
https://brainly.com/question/28108430
#SPJ1
The complete question is attached below.
The winner of a 500 mile race drove his car to victory at a rate of 142.4655 mph. What was his time (to the nearest thousandth of an hour)?
Answer:
3.509 hours
Step-by-step explanation:
500 m ÷ 142.4655 m/h = 3.509 h
what is the surface area, in square inches of a cube if the length of one side is 3inches
The surface area, in square inches of a cube if the length of one side is 3inches 9 inches squared
What is a square?A square is a four sided polygon whose all sides are equal. , A , square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles
The area of a squire is given as
Area = s²
Area = 3² = 9 inches ²
In conclusion the square has an area of 9 inches squared
Learn more about the area of a square on https://brainly.com/question/1658516
#SPJ1
Find the distance between the pair of points. (4,3) and (5,5)
Is it one solution many or no solution
The given expression x - 6 = 8 - (9+x) has one solution that is equals to 2.5
What is Algebraic expression ?
An algebraic expression is an expression that contains numbers, variables, and operations, such as addition, subtraction, multiplication, and division. It can also contain exponents and roots. Algebraic expressions can be used to represent a variety of real-world problems, such as finding the volume of a cube or the area of a circle.
Given expression ,
x - 6 = 8 - (9+x)
x-6 = 8-9-x
simplifying the terms,
x-6 = -1-x
shifting -x to LHS and -6 to RHS
we get,
x+x = 6-1
2x = 5
x = 5/2
x = 2.5
Hence, The given expression x - 6 = 8 - (9+x) has one solution that is equals to 2.5
To learn more about Algebraic expression from the given link.
brainly.com/question/953809
#SPJ1
all the questions answers
1. (a-b)(2ab+b²) results in the difference of two squares. (x-4)(x+4)= x²-16. (a + b)² = a² + 2ab + b²2. Brian's errors areoption b. (Incorrect, it is a square of a binomial.) and e. The middle term of the product is -10x. 3. (2x+6)(2x-6)= 4x²-36. The product of (2x+6) and (2x-6) is 4x²-36.
What is difference in two square and explain it?A difference of squares is a mathematical expression of the form (a - b)(a + b) or (a² - b²). It is a factorization technique that can be used to simplify expressions.The difference of squares can be derived from the distributive property, which states that for any two expressions, a and b, a(b + c) = ab + ac. By applying this property to (a - b)(a + b), we get:(a - b)(a + b) = a(a + b) - b(a + b) = a² + ab - ab - b² = a² - b²The difference of squares can also be derived from the difference of squares identity, which states that for any two expressions, a and b, a² - b² = (a - b)(a + b). This identity can be used to simplify expressions and solve equations.Example:x² - 16 = (x-4)(x+4)In this example, we can factor the left side of the equation x² - 16 by using the difference of squares identity. We can see that x² - 16 is in the form of a² - b² with a = x and b = 4. Therefore, we can factor it as (x - 4)(x + 4).So, difference of squares is a mathematical identity and technique used to simplify expressions or equations by factoring them in the form of (a² - b²) as (a-b)(a+b).To learn more about two square refer:
brainly.com/question/25543846
#SPJ1
The average price of a certain model of piano in 1991 was $12,500. In 2013 the average price of the piano was $17,500. What is the percentage increase in the average price of the piano?
The percentage increase in the average price of the piano is 40%.
What is the percentage increase?
To calculate the percentage increase, we use the following formula:
Percentage increase = (New value - Old value) / Old value x 100
In this case, the old value is the average price of the piano in 1991 ($12,500), and the new value is the average price of the piano in 2013 ($17,500). So, we can substitute these values into the formula:
Percentage increase = (17,500 - 12,500) / 12,500 x 100 = 40%
Hence, the percentage increase in the average price of the piano is 40%.
To learn more about the percentage increase, visit:
https://brainly.com/question/28398580
#SPJ1
does a complex carbohydrate molecule have more or less atoms than a glucose molecule?
Note that a complex carbohydrate molecule has more atoms than a glucose molecule.
What is the rationale for the above response?Glucose is a simple sugar and is composed of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Complex carbohydrates, such as starches and fibers, are made up of multiple glucose molecules linked together, so they have more atoms than a single glucose molecule.
Sugar molecules are joined together in long, complicated chains to form complex carbohydrates.
Foods high in complex carbs include peas, beans, whole grains, and vegetables. In the body, both simple and complex carbohydrates are converted to glucose (blood sugar) and utilized as energy.
Learn more about complex carbohydrates:
https://brainly.com/question/28777139
#SPJ1
Calculate the percent relative average deviation for the following set of data. 20.96, 20.85, 20.89, 20.92
The percent relative average deviation for the data set is 0.30%.
((20.96 - 20.89) + (20.85 - 20.89) + (20.92 - 20.89)) / 3 / 20.89 * 100 = 0.30%
The percent relative average deviation for the given data set can be calculated by first finding the absolute differences between each value and the mean (20.89) then adding those differences together. Once the differences are added, divide that by the mean and multiply by 100. This will give you the percent relative average deviation, which in this case is 0.30%.
The percent relative average deviation for the data set is 0.30%.
Learn more about average here
https://brainly.com/question/24057012
#SPJ4
Which of the hypothesis of Rolle's Theorem is not satisfied for the function f(x) = x^3/3 over [ 0, 2 ]?
Answer:
C. [tex]f(0)=f(2)[/tex]
Step-by-step explanation:
Rolle's theorem states that if a function f is continuous on the closed interval [a, b] and differentiable on the open interval (a, b) such that f(a) = f(b), then f′(x) = 0 for some x with a ≤ x ≤ b.
The function is not differentiable over [0, 2]. Therefore, the option B is the correct answer.
What is the hypothesis of Rolle's theorem?Rolle's theorem states that if a function f is continuous on the closed interval [a, b] and differentiable on the open interval (a, b) such that f(a) = f(b), then f′(x) = 0 for some x with a ≤ x ≤ b.
The given function is f(x)=x³/3 over [0, 2].
Here, f(0)= 2 and f(2)=2. Hence, according to the Rolle's theorem there should be at least one x for which f'(x)=0.
Now, f'(x)= 3x²/3
0=3x²/3
3x²=0
x²=0
x=0
Therefore, the option B is the correct answer.
Learn more about the Rolle's theorem here:
https://brainly.com/question/13972986.
#SPJ1
State the equation of the function whose graph is shown. (I'm needing help finding the equation from the graph (pic attached))
The quadratic function graphed is defined as follows:
y = -x² + 6x - 8.
How to define the quadratic function?A quadratic function of roots x' and x'' is defined as follows:
y = a(x - x')(x - x'').
From the graph, the roots of the function are the x-intercepts, which are the values of x for which the graph crosses the x-axis, hence they are given as follows:
x = 2 and x = 4.
Hence:
y = a(x - 2)(x - 4)
y = a(x² - 6x + 8).
In which a is the leading coefficient.
The vertex is at (3,1), meaning that when x = 3, y = 1, hence the leading coefficient a is obtained as follows:
1 = a(3² - 6(3) + 8)
-a = 1
a = -1.
Hence the function is defined as follows:
y = -x² + 6x - 8.
More can be learned about quadratic functions at https://brainly.com/question/1214333
#SPJ1
how much should you invest at a 5% annual rate to have an annual interest of $150
Based on proportion, the amount of investment to have an annual interest of $150 at a 5% annual rate is $3,000.
What is the interest?The annual interest is the amount that is paid or received for accepting or giving credit.
The annual interest can be computed as the product of the annual percentage rate and the principal.
Where information for the interest rate and amount is available, the principal is the reciprocal of the interest and rate.
The annual interest rate = 5%
The annual interest (in dollars) = $150
Proportionately, $150 = 5%; therefore, 100% of $150 = $3,000 ($150/5%)
Learn more about proportions and interests at https://brainly.com/question/1496357 and https://brainly.com/question/16134508
#SPJ1
an imperfectly elastic ball is projected with velocity √gh at an angle α with the horizontal, so that it strikes a vertical wall distant c from the point of projection, and returns to the point of projection. then
An imperfectly elastic ball is projected with the velocity [tex]\sqrt{gh}[/tex] at an angle α with the horizontal, so that it strikes a vertical wall distant c from the point of projection, and returns to the point of projection.
Then, The Time of flight (T) = [tex]\frac{2c}{ \sqrt{gh cosa } }[/tex]
When a ball is projected with the velocity [tex]\sqrt{gh}[/tex] at an angle α with the horizontal, it follows a parabolic path.
The ball will have a horizontal component of velocity (Vx) = [tex]\sqrt{gh cosa}[/tex] , and a vertical component of velocity (Vy) = [tex]\sqrt{ghsina}[/tex] .
The ball will travel a horizontal distance equal to c before reaching the wall. The total time of flight (T) for the ball is equal to the time it takes the ball to reach the wall plus the time it takes for the ball to return to the point of projection.
The time it takes for the ball to reach the wall is equal [tex]\frac{c}{vx}[/tex] , and the time it takes for the ball to return to the point of projection is also equal [tex]\frac{c}{vx}[/tex].
Since the horizontal component of velocity (Vx) is equal to [tex]\sqrt{gh cosa}[/tex] ,
the total time of flight (T) is equal to [tex]\frac{2c}{ \sqrt{gh cosa } }[/tex] .
The correct question is:
An imperfectly elastic ball is projected with velocity √gh at an angle α with the horizontal, so that it strikes a vertical wall distant c from the point of projection, and returns to the point of projection. Then the time of flight is equal to?
To know more about the Time of the flight,
https://brainly.com/question/30337310
#SPJ4
expand and simplify (3x-2) squared
Expanding and simplifying the expression gives:
(3x - 2)² = 9x² - 12x + 4
How to expand the given expression?
Here we want to expand and simplify the expression below:
(3x - 2)²
First let's expand that, we can rewrite this as:
(3x - 2)² = (3x - 2)*(3x - 2)
We can distribute that product to get:
(3x - 2)*(3x - 2) = (3x)*(3x) + (3x)*(-2) + (-2)*(3x) + (-2)*(-2)
Now we can keep simplifying this to get:
(3x)*(3x) + (3x)*(-2) + (-2)*(3x) + (-2)*(-2) = 9x² - 6x - 6x + 4
9x² - 6x - 6x + 4 = 9x² - 12x + 4
The simplified expression is:
9x² - 12x + 4
Learn more about simplificating expressions:
https://brainly.com/question/723406
#SPJ1
find the indicated side of the right triangle 30 7 a=
The indicated side of the triangle of side a = 14 and side b =12.12.
How can the triangle of side be calculated?The concept that will be used here is trigonometry. Trigonometry is the branch of mathematics that deals with particular angles' functions and how to use those functions in calculations. There are six popular trigonometric functions for an angle. Sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant are their respective names and acronyms (csc).
From the triangle, of the side a which is the hypothenus:
sin(θ)=opposite/hypothenus
but the angle (θ)
sin30= 7/hypothenus
hypothenus *sin30=7
hypothenus=7/sin30
hypothenus = a=14
Then we can do that For b:
cos(θ)=b/hypothenus
but hypothenus =14
cos30= b/14
b=14*cos30
b= 12.12
Learn more about triangle at:
https://brainly.com/question/17335144
#SPJ1
complete question:
Find the indicated side of the
triangle.
a
30°
b
b = [?][]
NO LINKS!!!
13. Prove that the functions are inverses by showing that f(g(x))= x and g(f(x)) = x
f(x) = x^3 + 7 and g(x) = ∛(x-7)
Answer:
See below for proof.
Step-by-step explanation:
[tex]\large\boxed{\begin{minipage}{4 cm}\underline{Exponent Rules}\\\\$\sqrt[n]{a}=a^{\frac{1}{n}}$\\\\$(a^b)^c=a^{bc}$\\\end{minipage}}[/tex]
Given functions:
[tex]\begin{cases}f(x) = x^3 + 7\\g(x) = \sqrt[3]{x-7}\end{cases}[/tex]
The composite function f[g(x)] means to substitute the function g(x) in place of the x in function f(x):
[tex]\begin{aligned}f[g(x)]&=[g(x)]^3+7\\&=(\sqrt[3]{x-7})^3+7\\&=((x-7)^\frac{1}{3})^3+7\\&=(x-7)^\frac{3}{3}+7\\&=(x-7)^1+7\\&=x-7+7\\&=x\end{aligned}[/tex]
The composite function g[f(x)] means to substitute the function f(x) in place of the x in function g(x):
[tex]\begin{aligned}g[f(x)]&=\sqrt[3]{f(x)-7}\\&=\sqrt[3]{(x^3+7)-7}\\&=\sqrt[3]{x^3+7-7}\\&=\sqrt[3]{x^3}\\&=(x^3)^{\frac{1}{3}\\&=x^{\frac{3}{3}\\&=x^1\\&=x\end{aligned}[/tex]
Hence proving that the functions are inverses by showing that f(g(x))= x and g(f(x)) = x.