the simple regression equation assumes that while the error is not observable, it has a distribution with a mean equal to

Answers

Answer 1

The simple regression equation assumes that while the error is not observable, it has a distribution with a mean equal to 0 and a constant variance.

A simple regression equation describes how a single variable relates to another variable. It is one of the most widely used statistical tools. Simple regression is used when one predictor variable, often referred to as an independent variable, is used to explain the variance in a dependent variable.There are two types of simple regression equations, linear and nonlinear.

A linear regression equation is a straight line with a constant slope that represents the relationship between two variables, while a nonlinear regression equation is a curve that represents the relationship between two variables.According to the simple regression equation, while the error is not observable, it has a distribution with a mean equal to 0 and a constant variance. The error is the difference between the actual and predicted values of the dependent variable, and it measures the accuracy of the regression equation's predictions.

The mean of the error is zero, which indicates that the predicted values are equal to the actual values on average. The variance of the error is constant, which indicates that the error is distributed evenly throughout the dataset.

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Related Questions

Work out the equation of the line of reflection that
transforms shape P into shape Q.

Answers

The equation of  line of reflection that transforms shape P into shape Q is y=7.

Reflection Definition

a reflection is known as a flip. A reflection is a mirror image of its shape. An image will reflect through the line, known as the line of reflection. Every point in a figure is said to mirror the other figure when they are all equally spaced apart from one another.

In the given figure, Shape P and Shape Q touches the line y=7 and Shape Q forms exact reflection of Shape P

Hence, the equation of the line of reflection that

transforms shape P into shape Q. is y=7.

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PLEASE HELP THIS IS DUE TODAY

Answers

Answer:B

Step-by-step explanation:

you have to worry about perfect multicollinearity in the multiple regression model because a. many economic variables are perfectly correlated. b. the ols estimator is no longer blue. c. the ols estimator cannot be computed in this situation.

Answers


No, you do not have to worry about perfect multicollineariy in the multiple regression model.

Perfect multicollinearity occurs when two or more independent variables are perfectly correlated, and it can lead to inaccurate estimates of the coefficients. The Ordinary Least Squares (OLS) estimator can still be computed in this situation, but the standard errors of the coefficients will be inflated. To minimize the effects of multicollinearity, you can use regularization methods such as Ridge Regression or Lasso Regression.

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You deposit $800 in an account that earns simple interest. The difference between the total interest earned after 7 years and the total interest earned after 3 years is $64. What is the annual interest rate?

Answers

Answer:

Step-by-step explanation:

A triangle has an area of 19.68 sqaure millimeteres and a height of 4.8 millimeteres. What is the length of the base?

Answers

Triangle area formula

Triangle area: triangle with base and height
A triangle is one of the most basic shapes in geometry. The best known and the most straightforward formula, which almost everybody remembers from school, is:

area = 0.5 * b * h, where b is the length of the base of the triangle, and h is the height/altitude of the triangle.
However, sometimes it's hard to find the height of the triangle. In that cases, many other equations may be used, depending on what you know about the triangle:

Triangle area: triangle with three sides
Three sides (SSS)

If you know the lengths of all sides, use the Heron's formula:

area = 0.25 * √( (a + b + c) * (-a + b + c) * (a - b + c) * (a + b - c) )

Triangle area: triangle with two sides and angle between them (SAS)
Two sides and the angle between them (SAS)

You can calculate the area of a triangle easily from trigonometry:

area = 0.5 * a * b * sin(γ)

Triangle area: triangle with two angles and side between them (ASA)
Two angles and a side between them (ASA)

There are different triangle area formulas versions - you can use, for example, trigonometry or law of sines to derive it:

area = a² * sin(β) * sin(γ) / (2 * sin(β + γ))

If you are looking for other formulas or calculators connected with triangles, check out this right triangle calculator, pythagorean theorem calculator, and law of cosines calculator.

Answer:

8.2mm

Step-by-step explanation:

Formula for area of triangle is 1/2 base x height

Since we are trying to find base, we must work in reverse.

19.68mm / 4.8 = 4.1mm (1/2 the base)
To find base we must multiply by 2

2 x 4.1mm = 8.2mm

Base = 8.2mm

a 86-ft tree casts a shadow that is 110 ft long. what is the angle of elevation of the sun? round the answer to two decimal places

Answers

The angle of elevation of the sun is 38.24 degrees (rounded to two decimal places).

The ratio of the height of the tree and the length of the shadow can be found by using the formula for tan which is given by:

tan(x) = (opposite/hypotenuse)

In the given problem statement, the height of the tree is opposite to the angle we are trying to find and the length of the shadow is the hypotenuse of the right-angled triangle. Therefore, we can say that:

tan(x) = opposite/hypotenuse = 86/110

We can use the inverse tangent function to find the value of x. This is because tan is the ratio of the opposite side (height of the tree) to the adjacent side (length of the shadow), and the inverse tangent function gives the angle that has that ratio.

So, tan x = 86/110 => x = tan⁻¹ (86/110) = 38.24 degrees (rounded to two decimal places). Therefore, the angle of elevation of the sun is 38.24 degrees.

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9 N = 480 ´ 109
(a) Write N as a number in standard form.
(1)
(b) Write N as a product of powers of its prime factors.
Show your working clearly.
(3)
(c) Find the largest factor of N that is an odd number.

Answers

Answer:

(a) To write 9 N as a number in standard form, we need to express it as a number between 1 and 10 multiplied by a power of 10. To do this, we can divide 9 N by 10 until we get a number between 1 and 10:

9 N = 480 × 10^9

9 N ÷ 10 = 48 × 10^9

9 N ÷ 10^2 = 4.8 × 10^9

9 N ÷ 10^3 = 0.48 × 10^9

9 N ÷ 10^4 = 0.048 × 10^9

9 N ÷ 10^5 = 0.0048 × 10^9

Therefore, 9 N = 4.8 × 10^10.

(b) To write N as a product of powers of its prime factors, we can first factorize N:

480 × 10^9 = 2^5 × 3 × 5 × 10^9

Then, we can express 10^9 as 2^9 × 5^9 and substitute it in the factorization:

2^5 × 3 × 5 × 2^9 × 5^9 = 2^14 × 3 × 5^10

Therefore, N = 2^14 × 3 × 5^10.

(c) To find the largest factor of N that is an odd number, we need to remove all factors of 2 from the factorization of N. We can do this by dividing N by 2 as many times as possible:

N = 2^14 × 3 × 5^10

N ÷ 2 = 2^13 × 3 × 5^10

N ÷ 2^2 = 2^12 × 3 × 5^10

N ÷ 2^3 = 2^11 × 3 × 5^10

N ÷ 2^4 = 2^10 × 3 × 5^10

N ÷ 2^5 = 2^9 × 3 × 5^10

N ÷ 2^6 = 2^8 × 3 × 5^10

N ÷ 2^7 = 2^7 × 3 × 5^10

N ÷ 2^8 = 2^6 × 3 × 5^10

N ÷ 2^9 = 2^5 × 3 × 5^10

N ÷ 2^10 = 2^4 × 3 × 5^10

N ÷ 2^11 = 2^3 × 3 × 5^10

N ÷ 2^12 = 2^2 × 3 × 5^10

N ÷ 2^13 = 2 × 3 × 5^10

N ÷ 2^14 = 3 × 5^10

Therefore, the largest factor of N that is an odd number is 3 × 5^10.

5=10÷x???????????????​

Answers

Answer:

x=2

Step-by-step explanation:

10÷2=5

Answer: x=2

Step-by-step explanation:

5x2 = 10

10÷5 = 2

hope this helped

I really need help on this please

Answers

Answer:

5.

[tex]≈1017.9 \: {ft}^{2} [/tex]

6.

[tex]≈50.3 \: {yd}^{2} [/tex]

7.

[tex]≈1809.6 \: {mm}^{2} [/tex]

8.

[tex]≈1256.6 \: {cm}^{2} [/tex]

Step-by-step explanation:

I added a photo of my solution, I hope I did it right

a sample of 90 adult randolph county residents showed that 59 own a home. what is the risk of owning a home?

Answers

The risk of owning a home in Randolph County based on the given sample can be calculated as:

Risk of owning a home = Number of residents who own a home / Total number of residents in the sample

Risk of owning a home = 59 / 90

Therefore, the risk of owning a home in Randolph County based on the given sample is approximately 0.656 or 65.6%.

ziggy has an exercise blood pressure of 150/60, a heart rate of 140 bpm, a max vo2 of 33 ml/kg/min, and a stroke volume of 95 ml. what is her mean arterial pressure?

Answers

90 mm Hg is Zigg's mean arterial pressure.

Here's the formula for calculating MAP: MAP = (CO x SVR) + CVPR

where:

CO stands for cardiac output (measured in liters per minute).

SVR stands for systemic vascular resistance (measured in mm Hg/L/min).

CVPR stands for central venous pressure (measured in mm Hg).

Now, let's get started with the calculation of MAP.

First, let's calculate CO (cardiac output): CO = HR x SV

where:

HR is heart rate (measured in beats per minute).

SV is stroke volume (measured in milliliters per beat).

CO = 140 bpm x 95 mlCO = 13300 ml/minCO = 13.3 L/min

Next, we need to calculate SVR (systemic vascular resistance).

The formula for calculating SVR is: SVR = (MAP - CVP) / CO

where:

MAP is mean arterial pressure (measured in mm Hg).

CVP is central venous pressure (measured in mm Hg).

CO is cardiac output (measured in liters per minute).

Since we don't have CVP in this question, let's assume it to be zero.

SVR = (MAP - 0) / 13.3 L/minSVR = MAP / 13.3 L/min

Now, we can rearrange the above equation to calculate

MAP:

MAP = SVR x 13.3 L/minMAP = 60 mm Hg (diastolic pressure) + 1/3 (systolic pressure - diastolic pressure)MAP = 60 mm Hg + 1/3 (150 mm Hg - 60 mm Hg)MAP = 60 mm Hg + 30 mm HgMAP = 90 mm Hg

Therefore, Ziggy's mean arterial pressure (MAP) is 90 mm Hg.

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100 points please help

Answers

In its simplest form of the quadratic equation, the answers to the equation 15z2 + 6z - 8 = 4z are z = 7/11 and z = -13/11.

Is an equation quadratic a formula?

The polynomial equations of degree two in one variable of type f(x) = ax2 + bx + c = 0 and with a, b, c, and R R and a 0 are known as quadratic equations. In its most basic form, it is a quadratic equation where "a" denotes the leading coefficient and "c" is the absolute term of f. (x).

We must first transform the problem into the form ax2 + bx + c = 0 where a, b, and c are constants before we can solve 15z2 + 6z - 8 = 4z using the quadratic formula.

Here are the facts:

a = 15 - 4 = 11

b = 6

c = -8

The quadratic formula is amended with the following values:

[tex]z = (-b ± √(b^2 - 4ac)) / 2a[/tex]

We get:

[tex]z = (-6 ± √(6^2 - 4(11)(-8))) / 2(11)[/tex]

Simplifying:

z = (-6 ± √(400)) / 22

z = (-6 ± 20) / 22

Thus, the solutions are:

z = (-6 + 20) / 22 = 7/11

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What is -(-7) ??????

Answers

The answer is 7 because two negatives cancel each other out to make a positive.

Need help
With this answer

Answers

The value of x in the given triangle is 2.44 units.

What are similar triangles?

If two triangles have an equal number of corresponding sides and an equal number of corresponding angles, then they are comparable.

Similar figures are described as items with the same shape but varying sizes, such as two or more figures. While both have the same form, the sizes may vary. Each pair of comparable angles are equal. Similar equivalent side ratios exist.

Given that, LM bisects angle JLK.

Thus, angle JLM = angle MLK.

The two triangles triangle JKL and triangle MLK are similar using AA criteria.

Since, the two triangles are equal the ratio of their sides are equal.

Using Pythagoras theorem in triangle MLK we have:

LM² = 4² + 8²

LM = 8.9

Now, using the ratio:

x + 3 / 8.9 = x / 4

4x + 12 = 8.9x

12 = 4.9x

x = 2.44

Hence, the value of x in the given triangle is 2.44 units.

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An arithmetic sequence begins with −42, −32, −22, −12, −2 …

Which option below represents the formula for the sequence?

f(n) = −42 − 10(n+1)
f(n) = −42 + 10(n+1)
f(n) = −42 − 10(n−1)
f(n) = −42 + 10(n−1)

Answers

Thus, the obtained formula for the arithmetic sequence is found as:

f(n) = -42 + 10(n - 1).

Explain about the arithmetic sequence?

A list of integers called an arithmetic sequence has a constant difference between terms. Any number may be the first in an arithmetic sequence, but the distance between succeeding terms must remain constant.

Unreal numbers can be used in a series. I believe that the next step in an equation should be an actual real number.

The nth term formula for the arithmetic sequence is:

f(n) = a1 + (n - 1)d

a1 is the first term n is the number of termsd is the common difference

arithmetic sequence -

−42, −32, −22, −12, −2 …

a1 = -42

d = -32 - (-42) = -32 + 42 = 10

So, formula for the sequence:

f(n) = -42 + (n - 1)10

f(n) = -42 + 10(n - 1)

Thus, the obtained formula for the arithmetic sequence is found as:

f(n) = -42 + 10(n - 1).

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can you draw a graph that has six vertices with degrees 5, 4, 3, 2, 2, 2? (this list is called the degree sequence of the graph.) is there more than one way to draw such a graph? what does the sum of the numbers in the degree sequence equal? can you draw a graph with degree sequence 3, 3, 2, 1, 1? what about 4, 3, 2, 1, 1?

Answers

It is possible to draw a graph with six vertices and degrees 5, 4, 3, 2, 2, 2. The sum of the numbers in the degree sequence is always even. It is possible to draw graphs with degree sequences 3, 3, 2, 1, 1, but not with 4, 3, 2, 1, 1.

Yes, it is possible to draw a graph with six vertices and the given degree sequence of 5, 4, 3, 2, 2, 2. Here is one example of such a graph:

In this graph, vertex 1 has degree 5, vertex 2 has degree 4, vertex 3 has degree 3, vertex 4 has degree 2, vertex 5 has degree 2, and vertex 6 has degree 2.

There can be more than one way to draw a graph with a given degree sequence. However, not all degree sequences can be realized as the degree sequence of a graph.

The sum of the numbers in the degree sequence is always even, since the sum is twice the number of edges in the graph. In the given degree sequence (5, 4, 3, 2, 2, 2), the sum is 18, which means the graph has 9 edges.

It is possible to draw a graph with the degree sequence 3, 3, 2, 1, 1. Here is one example of such a graph.

In this graph, vertices 1 and 2 have degree 3, vertex 3 has degree 2, and vertices 4 and 5 have degree 1.

It is not possible to draw a graph with the degree sequence 4, 3, 2, 1, 1, since the sum of the degrees in this sequence is 12, which is not even, and therefore cannot be the degree sequence of a graph.

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the radius of a spherical beach ball is 24 centimeters. If another spherical beach ball has a radius of 3 centimeters long, abut how much greater is its volume , to the nearest cubic centimeter?

Answers

The secοnd beach ball has a vοlume abοut 57,791.69 cubic cm less than the first beach ball.

What is vοlume?

Each thing in three dimensiοns takes up sοme space. The vοlume οf this area is what is being measured. The space οccupied within an οbject's bοrders in three dimensiοns is referred tο as its vοlume. It is sοmetimes referred tο as the οbject's capacity.

The vοlume οf a sphere with radius r is given by the fοrmula V = (4/3)πr³.

Fοr the first beach ball, with radius 24 cm, the vοlume is represented by the equatiοn-

V1 = (4/3)π(24 cm)³

V1 ≈ 57,904.79 cubic cm

Fοr the secοnd beach ball, with radius 3 cm, the vοlume is represented by the equatiοn -

V2 = (4/3)π(3 cm)³

V2≈ 113.10 cubic cm

The difference in vοlume between the twο beach balls is -

V1 - V2 ≈ 57,904.79 - 113.10

V1 - V2 ≈ 57,791.69 cubic cm

Therefοre, tο the nearest cubic centimeter, the vοlume is 57,792 cubic cm difference in bοth the beach balls.

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Align the variables in the equations.
2x - 3y = 9
1-6x +9y = -7

Answers

The variables in the equations are aligned as follows:   2x - 3y = 9 and

2x - 3y = 8/3

What does it mean by align a system of linear equation?

When we talk about aligning a system of linear equations, we mean rearranging the equations so that the variables are in the same order and have the same coefficients. This is done to make it easier to apply methods for solving systems of equations, such as substitution or elimination.

In a system of linear equations, each equation typically involves two or more variables. The variables may have different coefficients in each equation, and they may appear in a different order. Aligning the system involves rearranging the equations in a way that puts the variables in the same order, with the same coefficients.

Align the variables in given the system of linear equations :

To align the variables in the given equations, we need to rearrange the second equation so that the coefficients of  and  are the same as in the first equation.

To align the variables in the equations, we need to rearrange the terms so that the x, y, and constant terms are all grouped together.

Starting with the first equation:

2x - 3y = 9

We can rearrange this as:

2x = 3y + 9

Now we can divide both sides by 2 to get x by itself:

x = (3/2)y + 4.5

Now let's move on to the second equation:

1-6x +9y = -7

We can rearrange this as:

-6x + 9y = -8

Next, we'll divide both sides by -3 to get x by itself:

2x - 3y = 8/3

Now both equations are in the form of:

ax + by = c

where a, b, and c are constants. The aligned equations are:

2x - 3y = 9

2x - 3y = 8/3

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Which statement about this figure is true?


This figure can be named as a parallelogram and a quadrilateral.

This figure can be named as a parallelogram and a rhombus.

This figure can be named as a parallelogram and a square.

This figure can be named only as a parallelogram.

Answers

Answer:

This figure can be named as a parallelogram and a quadrilateral.

Step-by-step explanation:

A 4-sided polygon is a quadrilateral.

If both pairs of opposite sides of a quadrilateral are congruent, then the quadrilateral is a parallelogram. Since this is the case here, this quadrilateral is a parallelogram.

Answer: This figure can be named as a parallelogram and a quadrilateral.

Help needed LIKE RN!! URGENT!!

Answers

The surface area of the cylinder is approximately 127.17 cm².

What is the surface area of the cylinder?

Surface area of cylinder is the total space covered by the flat surfaces of the bases of the cylinder and its curved surface. The formula for the surface area of a cylinder is: 2πr² + 2πrh.

To solve this problem, we first need to find the radius of the cylinder. The diameter of the cylinder is 3 cm, so the radius is half of that:

r = 3/2

= 1.5 cm

We need to substitute the values we know into the formula for surface area:

= 2π(1.5)² + 2π(1.5)(12)

= 2π(2.25) + 2π(18)

= 4.5π + 36π

= 40.5π

We will now approximate the value of π to get the numerical answer, so, our Surface Area will be:

= 40.5π

= 40.5 * π

= 40.5 * 3.14

≈ 127.17 cm²

Answered question "A cylinder is 12 cm tall and has a diameter of 3 cm. What is the surface area?"

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Clarence's dining room is 24 feet wide and 25 feet long. Clarence wants to install wooden trim around the top of the room. The trim costs $1.00 per foot. How much will it cost Clarence to buy enough trim?

Answers

If the trim costs $1.00 per foot, So it will cost Clarence $98.00 to buy enough trim.

Define the term perimeter of a rectangle?

It is a two-dimensional shape with four vertices, or corners, and two pairs of parallel sides.

To find the amount of trim needed, we need to add up the perimeter of the dining room.

The perimeter of a rectangle is;

⇒ P = 2L + 2W

Here P → perimeter, L → length, and W → width.

put the given values,

⇒ P = 2(25) + 2(24) = 50 + 48 = 98 feet

Therefore, Clarence needs 98 feet of wooden trim. Multiplying this by the cost per foot gives us the total cost:

⇒ 98 feet × $1.00/foot = $98.00

So it will cost Clarence $98.00 to buy enough trim.

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If the trim is priced at $1.00 per foot, Clarence will need to spend $98.00 to purchase enough trim.

Define the term perimeter of a rectangle?

It is a two-dimensional shape with two sets of parallel sides and four vertices, or corners.

We must add up the dining room's perimeter in order to determine the required amount of trim.

A rectangle's perimeter is:

P = 2L + 2W

Here P → perimeter, L → length, and W → width.

put the given values,

P = 2(25) + 2(24) = 50 + 48 = 98 feet

Clarence therefore need 98 feet of wooden trim. We may calculate the whole cost by multiplying this by the price per foot.

98 feet × $1.00/foot = $98.00

So it will cost Clarence $98.00 to buy enough trim.

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PLS HELP......!

Fill in the blanks to describe each sequence in words. Then write the missing terms.

• Pyramidal Sequence: Each term in the sequence is the (BLANK) of a perfect square and all perfect squares before it.

1, (BLANK) , 14, 30, (BLANK) , 91, ...
• Fibonacci Sequence: Each term in the sequence is the (BLANK) of the 2 terms before it.

1, 1, 2, 3, (BLANK) , 8, 13, (BLANK) , 34, ...

Answers

• Pyramidal Sequence: Each term in the sequence is the sum of a perfect square and all perfect squares before it.

1, 5, 14, 30, 55, 91, ...

• Fibonacci Sequence: Each term in the sequence is the sum of the 2 terms before it.

1, 1, 2, 3, 5, 8, 13, 21, 34, ...

Can somebody please help with this? you don't have to understand Spanish its just a word search, please.

Answers

Answer: sure....... i actually understand Spanish so this is gonna be easy.

Step-by-step explanation:

Give me a few minutes to do it

Ok for startes when you find a word cross it off the word bank that is where your first mistake is......

PLEASE HELP NEED IT DONE RN

Answers

Answer:

B) 3

Step-by-step explanation:

219 / 73= 3

3 x 73= 219

Answer: 3

Step-by-step explanation:

Solve for y.
2y - 8x = 20
y = [ ? ]x + {?}

Answers

Answer:

y = 4x + 10

Step-by-step explanation:

2y - 8x = 20 ( add 8x to both sides )

2y = 8x + 20 ( divide through by 2 )

y = 4x + 10

Answer: y=4x+10

Step-by-step explanation:

g the number of bacteria in a culture increases from 600 to 1800 in 2 hours. assuming the rate of increase is proportional to the number of bacteria present, find:

Answers

The rate of increase of the number of bacteria is 1200/2 = 600 bacteria/hour.

To find the rate of increase of the number of bacteria in a culture, we can use the formula

rate of change = change in number of bacteria/time elapsed.

In this case, the change in number of bacteria is 1800-600 = 1200, and the time elapsed is 2 hours.

Thus, the rate of increase of the number of bacteria is 1200/2 = 600 bacteria/hour.

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The sales tax rate is 10%. If Ariana buys a cowboy hat priced at $25, how much tax will she pay?

Answers

Answer:

$27.50

Step-by-step explanation:

If the sales tax rate is 10%, then Ariana will pay 10% of the price of the cowboy hat as tax.

To calculate the amount of tax Ariana will pay:

First, we need to calculate the amount of the tax by multiplying the price of the cowboy hat by the sales tax rate: 0.10 x $25 = $2.50

So, the amount of tax that Ariana will pay is $2.50.


Therefore, Ariana will pay $2.50 in tax when she buys the cowboy hat priced at $25. Her total cost will be $25 + $2.50 = $27.50.

Answer:

2.50$

Step-by-step explanation:

Hope that helps ✌

Prove that the two triangles are congruent. Be sure to include each step in the proof.

Answers

Triangle ABC and triangle DEF are congruent, according to the Side-Angle-Side (SAS) postulate.

Congruent Sides Angles: What Are They?

If the matching sides and angles of two triangles are the same length, then the triangles are said to be congruent. Congruent sides angles are what these are called.

Triangle ABC must be shown to be congruent with triangle DEF.

By demonstrating that the two triangles have a single pair of congruent sides, we can get started. We can observe that AB and DE are both 6 cm long.

The congruent angle between the two triangles can be demonstrated. As BAC and EDF are both right angles, we can see that they are equivalent.

Thus, according to the Side-Angle-Side (SAS) hypothesis Triangle ABC is consistent with triangle DEF, we can say.

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PLEASE HELP

Write and simplify a polynomial expression to find the area of 4 circles. Each circle has a radius of (4a-6)

Answers

Answer: 64πa^2-192πa+144

Step-by-step explanation:

Area of a circle: π •r^2

So then the area would be: 4•π(4a-6)^2

FOIL (4a-6)(4a-6) and get 16a^2-48a+36

Plug it in and get 4•π(16a^2-48a+36)

Distribute pi sign and get 4•(16πa^2-48πa+36π)

Distribute the 4 and you get 64πa^2-192πa+144

Answer: 64πa^2-192πa+144

g. Substitute x back into one of the equation to solve for y. 5x+2y=7 3x-y=2

Answers

Answer: Substitute x back into one of the equations to solve for y.

Step-by-step explanation:

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