The length of median A is 11.7.
What is centroid and median of a triangle and its coordinates?The point of intersection of a triangle's medians is its centroid (the lines joining each vertex with the midpoint of the opposite side).
If the triangle has its vertices as (x_1, y_1), (x_2, y_2) , \: (x_3, y_3), then the coordinates of the centroid of that triangle is given by:
[tex](x,y) = \left( \dfrac{x_1 + x_2 + x_3}{3} + \dfrac{y_1 + y_2 + y_3}{3} \right)[/tex]
Given;
The sides of triangle
a = 4, b = 5 and c = 6
The median of triangle =½√(2b2+2c2-a2).
=(2*5*5+2*6*6-4*4)
=(50+72-16)
=[tex]\sqrt{138}[/tex]
=11.7
Therefore, the median of triangle will be 11.7
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Sylvan solved the division problem below. He made a mistake in his method. 1.6 divided by 0.4 with quotient 0.4. Subtract 1.6 from 1.6. Zero left over. A. What is the mistake that Sylvan made solving the problem?
Sylvan made a mistake computing the quotient in the problem.
What is the BODMAS rule?According to the BODMAS rule, the brackets have to be solved first followed by powers or roots (i.e. of), then Division, Multiplication, Addition, and at the end Subtraction. Solving any expression is considered correct only if the BODMAS rule or the PEMDAS rule is followed to solve it.
Given here: 1.6 divided by 0.4
We know 1.6 can be expressed as 1.6=0.4×4
x ÷ y = z.
1.6÷0.4=4
Division method is nothing but the inverse of multiplication.
Divide 1.6 by number 0.4.
Solution:1.6÷0.4=1.6/0.4 with remainder zero
=4
Thus the quotient should have been 4
But according to Sylvan 1.6/0.4=0.4 which is not correct.
Hence, Sylvan computed the wrong quotient.
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you know there are 2 boys and an unknown number of girls in a nursery at a hospital. then a woman gives birth a baby, but you dont know its gender, and it is placed in the nursery. then a nurse comes in a picks up a baby and it is a boy. given that the nurse picks up a boy, what is the probability that the woman gave birth to a boy?
The probability that the woman gave birth to a boy, given that the nurse picked up a boy, is 1/3.
There are 2 boys initially and an unknown number of girls in the nursery, so there were a total of 2 + x babies in the nursery, where x is the number of girls.
Since we know that one of those babies is a boy, there are a total of 2 + x - 1 = 1 + x babies left in the nursery.
So the probability of the nurse picking up a boy, given that the woman gave birth to a boy, is 1/(1+x).
P(boy | picked up boy) = P(picked up boy | boy) * P(boy) / P(picked up boy)
= (1/(1+x)) * 1/2 / (1/(1+x) * 1/2 + x/(1+x) * 1/2)
= 1/3
So the probability that the woman gave birth to a boy, given that the nurse picked up a boy, is 1/3.
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An automobile magazine reports the number of miles driven for different amounts of gas which car travel far this on 1 gallon of gas answer questions 5-8
Car 'B' travels the farthest on one gallon of gas.
From the table of the number of miles car a can drive for different amount of gas, car 'A' needs 8 gallons of gas to cover 200 miles.
So, in one gallon of gas, a car 'A' would cover 25 miles.
By unitary method we will find the remaining values.
Let a car drive 't' miles in 4 gallons of gas
Using unitary method,
t = 25 × 4
t = 100 miles
So, we can say that the rate of the number of miles driven per amounts of gas for car 'A' is 25 miles per gallon.
Car b can travel 140 miles for every 5 gallons of gas.
So, the rate for car B is 140/5 = 28 miles/gallon
And from the graph, the rate for car 'C' would be 81/3 = 27 miles/gallon
Thus, car B is the fastest.
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Find the complete question below.
the descriptive measure of dispersion that is based on the concept of a deviation about the mean is the . a. weighted mean b. range c. interquartile range d. standard deviation
The descriptive measure of dispersion that is based on the concept of a deviation about the mean is the standard deviation.
What is Mean?
The sum of all values divided by the total number of values determines the mean (also known as the arithmetic mean, which differs from the geometric mean) of a dataset. The term "average" is frequently used to describe this measure of central tendency.
The method of measuring dispersion most frequently employed is the standard deviation (SD). It is a measurement of data spread around the mean. The SD is calculated by multiplying the total squared departure by the mean by the total number of observations.
Variance is a measure of dispersion that, in contrast to the range and interquartile range, accounts for the spread of all data points in a data collection. Along with the standard deviation, which is just the square root of the variance, it is the measure of dispersion that is most frequently employed.
Therefore, although Mean, Mode, and Median are the measures of central tendency, Standard Deviation, Variance, and Range are measures of dispersion.
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6. Which measure is equivalent to 660 feet?
7800 inches
mile
330 yards
1980 yards
=> Convert feet into yards.
660 feet = 220 yards.
=> Convert feet into inches.
660 feet = 7920 inches.
Now, According to the question:
=> Convert feet into inches.
660 feet = 7920 inches
Formula: multiply the value in feet by the conversion factor '12'.
So, 660 feet = 660 × 12 = 7920 inches.
=> Convert feet into yards.
660 feet = 220 yards
Formula: divide the value in feet by 3 because 1 yard equals 3 feet.
So, 660 feet = 660/3
660 feet = 220 yards.
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Given f (x)=9-14/x, find all c in the interval [2, 7] that satisfy the Mean Value Theorem
The value of c is √14 in the interval [2, 7], which satisfies the Mean Value Theorem.
By definition, the mean value theorem is
f'(c) = [f(b) - f(a)]/b - a
So, in this case, we know that a = 2 and b = 7.
Now, we need to find f(2) and f(7) by replacing those values with the given function
f(x) = 9 - 14/x
f(7) = 9 - 14/7 = 9 - 2 = 7
So, f(b) = f(7) = 7.
f(x) = 9 - 14/x
f(2) = 9 - 14/2 = 9 - 7 = 2
So, f(a) = f(2) = 2
Then, we replace all values,
f'(c) = [f(b) - f(a)]/b - a
= (7 - 2)/(7 - 2)
= 5/5
= 1
Now, calculate the derivative of the function, which has to be equal to 1,
f(x) = = 9 - 14/x
f'(x) = 14/x² = 1
Now, we solve the equation to calculate the value of c,
14/x² = 1
x² = 14
x = √14
Therefore, c = √14 is the value inside the given interval that satisfies the mean value theorem.
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Which descriptions and equations could be the function rule? Select all that apply. The table in attached image shows some of the input and output values for a function rule.
For the given table of values the equation that could be the function rule is option 4: y = 3x - 2.
What is a function?
In mathematics, a function is a unique arrangement of the inputs (also referred to as the domain) and their outputs (sometimes referred to as the codomain), where each input has exactly one output and the output can be linked to its input.
The table of input and output values are given for the function.
The slope-intercept form of an equation/function is - y = mx + b
To find the slope m use the formula -
(y2 - y1)/(x2 - x1)
Substituting the values in the equation -
[-2 - (-11)]/[0 - (-3)]
(-2 + 11)/(0 + 3)
9/3
3
So, the slope point is obtained as m = 3.
The equation becomes - y =3x + b
To find the value of b substitute the values of x and y in the equation -
-11 = 3(-3) + b
-11 = -9 + b
b = -11 + 9
b = -2
So, the value for b is -2.
Now, the equation becomes -
y = 3x - 2
The graph is plotted for the function.
Therefore, the equation is y = y = 3x - 2.
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Determine the intercepts of the line.
Do not round your answers.
3x+2y=5
Answer:
x intercept = 1.66666...
y intercept = 2.5
The x intercept is approximate. The 6's go on forever. The y intercept is exact without any rounding done to it.
======================================
Explanation:
Plug in y = 0. Then solve for x to get the x intercept.
3x+2y = 5
3x+2*0 = 5
3x = 5
x = 5/3
x = 1.66666...
The 6's go on forever.
------------------
Plug x = 0 into the equation and solve for y. This will get us the y intercept.
3x+2y = 5
3*0+2y = 5
0+2y = 5
2y = 5
y = 5/2
y = 2.5
This value is exact without any rounding
the fourth graders at pleasant grove elementary school voted for a new school mascot. wyatt the wolf got 90 votes. that is 9 times as many votes as bobby the bobcat got. how many votes did bobby the bobcat get?
335 students of fourth graders voted for the Falcon.
A fraction represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters. Similar to real numbers and whole numbers, a fractional number also holds some of the important properties. They are:
Commutative and associative properties hold true for fractional addition and multiplication
The identity element of fractional addition is 0, and fractional multiplication is 1The multiplicative inverse of a/b is b/a, where a and b should be non zero elementsFractional numbers obey the distributive property of multiplication over additionUsing proportions, it is found that 335 students voted for the Falcon. In total, 536 students voted for a mascot. The proportion that voted for the Falcon is 5/8 of the total number of students. To find the number of students that voted for the Falcon, we multiply the proportion of 5/8 by the total of 536, thus: 335 students voted for the Falcon.
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10)
2(34 + 12) > 50
This inequality contains a variable, b. Choose ALL numbers that make this inequality true.
A)
16
B)
18
0
19
ELIM
D)
20
E)
22
11)
Which factorization is equivalent to this expression?
For the inequality "2(34 + 12) > 5b" that contain a variable "b" , then the numbers that make this inequality true are (a) 16 , (b) 18 .
The inequality containing the variable "b" is ⇒ 2(34 + 12) > 5b ;
simplifying the inequality ,
we have ;
⇒ 2×(46) > 5b ;
⇒ 92 > 5b ;
(a) Substituting value of b = 16 ,
we get ; 92 > 5×16
⇒ 92 > 80 , TRUE .
(b) Substituting value of b = 18 ,
we get ; 92 > 5×18
⇒ 92 > 90 , TRUE .
(c) Substituting value of b = 19 ,
we get ; 92 > 5×19
⇒ 92 > 95 , FALSE .
(d) Substituting value of b = 20 ,
we get ; 92 > 5×20
⇒ 92 > 100 , FALSE .
Therefore , the inequality is TRUE for two values of b that are (a) 16 , (b) 18.
The given question is incomplete , the complete question is
This inequality 2(34 + 12) > 5b ; contains a variable "b". Choose ALL numbers that make this inequality true.
(a) 16
(b) 18
(c) 19
(d) 20
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Move a number to each box to create an equation to solve 8/100+9/10 =
The solution of the given fraction can be gotten through filling the boxes with the following values respectively;
8/100 + 9/10 = 98/100
What is a fraction?A fraction is defined as the representation of a part of a whole value in the form of a numerator and denominator.
The given fraction;
8/100 + 9/10 = ?
Find the lowest common multiple of the denominator = 100.
= 8/100 + 9/10
= 8 + 90/100
= 98/100
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Which term is missing in this problem?
2x3 + 5x2 + 9
x + 3
After performing the division , the missing term in the problem is (2x³ + 5x² + 9)/(x + 3) = (2x² -x +3) .
The problem is (2x³ + 5x² + 9)/(x + 3) ;
that means , we have to divide , the expression "2x³ + 5x² + 9" by "x + 3" ;
first we multiply (x+3) by 2x² ;
the expression becomes : 2x³ + 5x² + 9
-2x³ - 6x²
-x² + 9
next we multiply by -x : -x² - 3x
3x + 9
next we multiply by 3 : -3x - 9
0 .
So , dividing the "2x³ + 5x² + 9" by "x + 3" , we get the remainder is 0 and the quotient is 2x² - x + 3 .
Therefore , the missing term is 2x² - x + 3 .
The given question is incomplete , the complete question is
Which is the missing term in this problem ?
(2x³ + 5x² + 9)/(x + 3) = ______ ;
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bob went out to buy some fishing equipment. he spent half of what he had plus $5 at the first store. at the second store, he spent half of what was left plus $4, and at the third store, he spent half of the remainder plus $3. he then had $5 left to put aside for bait. how much money did he start with?
If he had $5 left to put aside for bait, he start with $2.
Let 2x be amount of money Thomas started with.
He spent spent half of what he had plus $5 at the first store.
So the expression should be x + 5.
So, we have left money = 2x - (x+5)
Left Money = 2x - x - 5
Left Money = x - 5
he spent half of what was left plus $4 in second store.
So the expression should be = (x - 5)/2 + 4
Now he has left money = 2x - [(x - 5)/2 + 4]
left money = 2x - (x - 5)/2 - 4
After solving, we get
left money = 3x/2 - 3/2
left money = 3(x-1)/2
At the third store, he spent half of the remainder plus $3.
So the expression should be = \frac{3(x-1)/2}{2} + 3
Now he has left money = 2x - \frac{3(x-1)/2}{2} + 3
Now simplifying
Left Money = 2x - 3(x-1)/4 + 3
After solving we get;
Left money = 5x/4 + 15/4
Left money = (5x+15)/4
According to question, he had $5 left. So
(5x+15)/4 = 5
Multiply by 4 on both side, we get
(5x+15) = 20
Subtract 15 on both side, we get
5x = 5
Divide by 5 on both side, we get
x = 1
He start with money 2x = 2*1 = $2
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what is the distance between (-6 5) and (-6 -3.5)
The distance between (-6 5) and (-6 -3.5) is 14.71 units
How to find length of the lineThe length of line in an ordered pair is calculated using the formula
d = √{(x₂ - x₁)² + (y₂ - y₁)²}
where
d = distance between the points
x₂ and x₁ = points in x coordinates
y₂ and y₁ = points in y coordinates
distance between points (-6, 5) and (-6, -3.5) is calculated as follows
d = √{(x₂ - x₁)² + (y₂ - y₁)²}
d =√{(-6 - 6)² + (5 - -3.5)²}
d =√{144 + 72.25}
d = √216.25
d = 14.71 units
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Which of the following statements is true?
C
Step-by-step explanation:
c,c is the answer i think so
x-y = -8 7x + 5y = 16
Which one is correct?
(8,16) or (-2,6)
Please explain how you got the answer.
Answer:
I think it is (8,16).
Dan Elliott uses online banking. He pays the basic monthly charge, 9 bills, and requests a printed statement. He also has ATM transactions that include 2 out of networks transactions and a cash advance of $200. 0. What are his total fees for the month ?
If Dan Elliott uses inline banking to pay 9 bills , a printed statement , 2 out of network transactions and cash advance of $200 , then the total fees for the month is $221.45 .
The Basic monthly charge for the bank is = $6.95 ;
The cost of 1 bill payment is = $0.50 , and Dan Elliott paid 9 bills ,
So , Cost of 9 Bill payment is = 9 × 0.50 = $4.5 ;
the charge for printing the statement is = $4 ;
The Surcharge for 1 out of network transaction is = $3 , and
Dan Elliott made 2 Out of Network transactions ,
So , Surcharge for 2 Out of Network transactions = $3 × 2 = $6 ;
he also has a cash advance of $200 ;
The Total Fees can be calculated by Adding all the charges that means :
Total Fees = Basic Charge + Bill Payment + Statement + ATM Surcharge + Cash Advance Fees ;
Substituting the values :
we get ;
Total Monthly Fees = $6.95 + $4.5 + $4 + $6 + $200
= $221.45
Therefore , The total fees for the month is $221.45 .
The given question is incomplete , the complete question is
Dan Elliott uses online banking. He pays the basic monthly charge, 9 bills, and requests a printed statement. He also has ATM transactions that include 2 out of networks transactions and a cash advance of $200. 0. What are his total fees for the month ?
The Charges are as follows : Basic Monthly Charge is $6.95 ;
1 bill payment costs $0.50 ; A printed statement costs $4 ;
The Out of network Surcharge is $3 .
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John makes $8 per hour walking dogs and $16 per hour as a math tutor. This weekend, he wants to work no more than 10 hours. He also wants to earn at least $96. Create a system of inequalities to model this
John must work 8 hours walking the dog and 2 hours as a Maths tutor in order to earn at least $96.
Let us assume that m represents the number of hours he walks the dogs
and n represents the number of hours he works as a maths tutor
John wants to work no more than 10 hours.
As we know the statement 'No more' is represented by the inequality '≤'
So, we get an inequality
m + n ≤ 10 ...........(1)
Also, he also wants to earn at least $96.
As we know the statement 'at least' is represented by the inequality '≥'
So, we get an inequality
8m + n ≥ 96 ...........(2)
So, we get a system of inequalities:
m + n ≤ 10
8m + n ≥ 96
Now, we solve this system of inequalities.
Consider m + n = 10 .........(3)
and 8m + n = 96 .........(4)
Substitute m = 10 - n for x in Equation 4
8(10 - n) + 16n = 96
80 - 8n + 16n = 96
8n = 96 - 80
n = 2
Substitute above value of n in equation m = 10 - n
m = 10 - 2
m = 8
Thus, John must work 8 hours walking the dog and 2 hours as a Maths tutor.
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The complete question is:
John makes $8 per hour walking dogs and $16 per hour as a math tutor. This weekend, he wants to work no more than 10 hours. He also wants to earn at least $96. Create a system of inequalities to model this and solve.
PLS HURRY ITS TIMED Use a graphing calculator to sketch the graph of the quadratic equation, and then state the domain and range. y = x squared + 2 x minus 5 a. D: all real numbers R: (y less-than-or-equal-to negative 6) c. D: all real numbers R: (y less-than-or-equal-to negative 5) b. D: all real numbers R: all real numbers d. D: all real numbers R: (y greater-than-or-equal-to negative 6)
The graph of the quadratic function y = x² + 2x - 5 is given by the image at the end of the answer.
The domain and range are given as follows:
Domain: all real values.Range: y >= -6.How to obtain the domain and the range of the function?The domain of a function is the set that contains all the possible input values for the function, hence in the graph it is composed by the values of x of the function.
The range of a function is the set that contains all the possible output values for the function, hence in the graph it is composed by the values of y of the function.
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the garden clud at central middle school is planting a flower bed. a scale drawing of the flower is shown. the scale 1 in. :2 ft
If the plant is n inches then,
the actual plant = 2n feet.
What is a scale factor?The ratio of the scale of an original thing to a new object that is a representation of it but of a different size is known as a scale factor (bigger or smaller).
Given:
The garden club at central middle school is planting a flower bed.
A scale drawing of the flower is shown.
The scale 1 in:2 ft
The scale factor,
the model = 1 inch
Then the actual plant = 2 feet.
If the plant is n inches then,
the actual plant = 2n feet.
Therefore, If the plant is n inches then, the actual plant = 2n feet.
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USE the figure to complete the statement if not similar choose not similar
Only one angle of the triangles ΔABC and ΔDEF is congruent. Then the triangles ΔABC and ΔDEF are not similar to each other.
What is the triangle?The polygonal shape of a triangle has a number of sides and three independent variables. Angles in the triangle add up to 180°.
The ratio of the matching sides will remain constant if two triangles are comparable to one another.
In triangle ΔABC, angle ∠B = 86° and ∠C = 55°, then angle ∠A is given as,
∠A + ∠B + ∠C = 180°
∠A + 86° + 55° = 180°
∠A = 39°
In triangle ΔDEF, angle ∠D = 55° and ∠F = 40°, then angle ∠E is given as,
∠E + ∠F + ∠D = 180°
∠A + 40° + 55° = 180°
∠A = 85°
Only one angle of the triangles ΔABC and ΔDEF is congruent. Then the triangles ΔABC and ΔDEF are not similar to each other.
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4. A rectangle is 22 inches long and 10 inches wide. What is the length of the diagonal of the rectangle (the line that
goes across it from one corner to the next)?
The length of the diagonal of the rectangle is 24cm.
The diagonal of the rectangle equals the square root of the width squared plus the height squared.
The width of the rectangle is indicated by the letter “w” and the length of the rectangle is indicated by "l".So, the diagonal of a rectangle formula is expressed as d = (l² + w²),
According to the question,
A rectangle is 22 inches long and 10 inches wide.
To observe the diagonal we use the Pythagorean Theorem:
Let, x = hypotenuse
22² + 10² = x²
⇒484 +100 =x²
⇒x = 24.14 =24
So, the length of the diagonal of the rectangle is 24cm.
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30 points avaliable!
Noah wants to buy exactly 84 pencils. What is the lowest amount he can pay?
Option 1: 30 pence each
Option 2: Pack of 10 pencils for 2 pounds
Give your answer in pounds
Please when answering this question don't choose from the options but give me the lowest amount in pounds that he can pay.
The lowest amount in pounds that Noah can pay to purchase pencils is ≥ 16.8 pounds.
What is the unitary method?The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
Given that, Noah wants to buy exactly 84 pencils.
Pack of 10 pencils for 2 pounds.
So, the cost of each pencil is 2/10 =0.2 pounds
Then the cost of 84 pencils is
8 packs + 4 pencils
= 8×2+4×0.2
= 16+0.8
= 16.8 pounds
So, the cost of 84 pencils ≥ 16.8 pounds
Therefore, the lowest amount in pounds that Noah can pay to purchase pencils is ≥ 16.8 pounds.
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12.) Solve the right triangle. Round answers to the nearest tenth. To receive full credit you must show all work. M 8 40° K L 2 Solve the right triangle Bound answers to the nearest tonth KL = ML = mZK =
Answer: KL = 6.1, MK = 5.2 and the angle mZK = 40.
Step-by-step explanation: In this problem, to solve for the remaining sides and angles of the triangle, we can use trigonometry.
First, let's use the sine function to find the value of KL:
sin(40) = KL/ML
KL = (sin(40))(ML)
KL = (sin(40))(8)
Next, let's use the cosine function to find the value of MK:
cos(40) = MK/ML
MK = (cos(40))(ML)
MK = (cos(40))(8)
Finally, let's use the tangent function to find the value of mZK:
tan(40) = KL/MK
mZK = tan(40)
To round the answers to the nearest tenth, we can use the function Math.round(x * 10) / 10 in Javascript.
sin(40) = 0.766
cos(40) = 0.644
tan(40) = 1.193
KL = (0.766)(8) = 6.128 ≈ 6.1
MK = (0.644)(8) = 5.152 ≈ 5.2
mZK = 1.193
So the triangle KL = 6.1, MK = 5.2 and the angle mZK = 40.
Answer:
To solve the right triangle, we can use the trigonometric ratios sine, cosine, and tangent.
Given:
angle K = 40°
ML = 8
KL = 2
We can use the sine function to find the value of angle M:
sin(M) = KL / ML
sin(M) = 2 / 8
sin(M) = 0.25
So M = arcsin(0.25) = 14.04 (approximately)
Next, we can use the cosine function to find the value of MK:
cos(M) = ML / KL
cos(M) = 8 / 2
cos(M) = 4
So MK = 4
Lastly, we can use the tangent function to find the value of angle L:
tan(L) = KL / MK
tan(L) = 2 / 4
tan(L) = 0.5
So L = arctan(0.5) = 26.57 (approximately)
So the triangle is ML = 8, KL = 2, and angles M = 14.04° and L = 26.57° rounded to the nearest tenth.
A linear function passes through the points (-3, 7) and (2, -3). Part A: What is the slope of the linear function that passes through these points. Part B: What is the function rule of the linear function that passes through these points. Part C: Where does the linear function intersect the x-axis and y-axis?
A) The slope of the line is 2.
B) the linear equation is y = 2x - 7
C) y-intercept = -7
x-intercept = 3.5
How to find the linear equation?A general linear equation can be written as:
y = m*x + b
Where m is the slope.
If the line passes through two points (x₁, y₁)and (x₂, y₂), then the slope is:
m = (y₂ - y₁)/(x₂ - x₁)
In this case these points are (-3, 7) and (2, -3), then the slope is:
m = (-3 - 7)/(2 + 3) = 2
Then the line is something like:
y = 2x + b
To find the value of b we can replace the values of the point (2, -3), we will get:
-3 = 2*2 + b
-3 - 4 = b
-7 = b
y = 2*x - 7
C) the y-intercept is the value of y when x = 0.
y = 2*0 - 7
y = -7
The x-intercept is the value of x when y = 0.
0 = 2*x -7
7 = 2x
7/2 = x
3.5 = x
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A ski resort charges $14 for snowshoe rental, plus an additional dollar per hour. Let h represent the duration of a rental in hours and c represent the total cost of the rental. Complete the equation that represents the relationship between h and c.
c=14+xh is the equation that represents the relationship between h and c.
What is Expression?An expression is combination of variables, numbers and operators.
Given that ski resort charges $14 for snowshoe rental, plus an additional dollar per hour.
Let h represent the duration of a rental in hours and c represent the total cost of the rental.
We have to find the relationship between h and c.
c=14+xh
Here x represents the dollar.
Hence, c=14+xh is the equation that represents the relationship between h and c.
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Solve the following linear equations.
1. y + y+1 + y+2 = 90
2. 5(m+4)=-20
3. 3x-8=2x+2
Answer:
1. y=29
2. m= -8
3. x=10
Step-by-step explanation:
1. Add the numbers
y+y+1+y+2=90
y+y+3+y=90
combine like terms
3y+3=90
Subtract 3 from both sides
3y+3-3+90-3
3y=87
Divide both sides by the same factor
3y/3 = 87/3
y=29
2. Distribute
5(m+4)=-20
5m+20=-20
Subtract 20 from both sides
5m+20=-20
5m+20-20+-20-20
Simplify
5m=-40
Divide both sides by the same factor
5m/5 = -40/5
m= -8
3. Add 8 to both sides
3x-8=2x+2
3x-8+8+2x+2+8
Simplify
3x=2x+10
Subtract 2x from both sides
3x=2x+10
3x-2x+2x+10-2x
x=10
a horseman left the village at a point with coordinates (-2, 5) and began riding along a straight road whose direction was given by the vector . then at some point he turned at a right angle; he never changed direction again until he arrived in the village at the point with coordinates (2, 11). at the point where he made the turn he buried a jar full of silver coins. unfortunately, he forgot the coordinates of the point. can you help him recover them?
The point where he buried his treasure is (6.28,9.84)
First of all, we are going to find the equation of the line which describes the first path crossed by the horseman. In order to find it we have to take into account that the vector V provides us with the direction of this path. We can associate the direction with the slope of the line. The slope is defined by the ratio of vertical changes to horizontal changes between two points.
According to the V=6i+5j, we can determine that:
Vertical change (y)= 5
Horizontal change (x)=6
Slope=\frac{5}{6}
Now, using the point-slope form:
y-y₁=m(x-x₁)
The chosen point is the point where the horseman began riding (-2,5). Therefore:
m=5/6
y1=5
x1=-2
y-5=5/6(x+2)
y=5x/6-10/3
Since the horseman at some point turned at a right angle towards village B and he unchanged his direction until arrived in village B, the second path must be described by a line perpendicular to the first path.
We should know that two lines are perpendicular if and only if their slopes are negative reciprocals This means m1*m2=-1
m₁=5/6
m₂=-1/m₁=-6/5
In order to find the equation of the second path, we will use again the point-slope form.
The chosen point is the point where is located Village B (2,11)
y-11=-6/5(x-2)
y=-6x/5+13.4
The coordinates of the point where the horseman buried a jar full of silver coins correspond to the intersection of path 1 and path 2. Therefore we are going to equal the two equations of each path.
5x/6-10/3=-6x/5+13.4
Solving this equality for x
X=6.28
Replacing this value in any of the equations of the paths
Y=9.84.
Finally, the point where he buried his treasure is (6.28,9.84).
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Solve and classify the given system of linear equations. p=5(q+2) p=q-3
Answer:
q= -3.25 and p= -6.25
Step-by-step explanation:
p=5q+10. p=q-3
p-5q=10. p-q=-3 subtract the two equations
-4q=13 q= -3.25 and p= -6.25
When filled to the brim, a swimming pool can hold 9.745 cubic yards of water. Calculate the width of the swimming pool if it has a length of 3 yards and a height of 2 yards.
The width of the swimming pool is 1.624yards.
What is volume?In mathematics, volume is the space taken by an object. Volume is a measure of three-dimensional space. It is often quantified numerically using SI derived units or by various imperial or US customary units. The definition of length is interrelated with volume.
Here, we have,
a swimming pool can hold 9.745 cubic yards of water.
i.e. V = 9.745
it has a length of 3 yards and a height of 2 yards.
i.e. l= 3
h=2
so, width = w = V/(l*h)
i.e. w = 1.624
Hence, the width of the swimming pool is 1.624yards.
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