8th grade math, please help.

8th Grade Math, Please Help.

Answers

Answer 1

Answer:

The x= 57

Step-by-step explanation:

They are exterior angles so they have to be the same.

Answer 2

Answer:

57

Step-by-step explanation:

x and the 57° angle are alternate exterior angles of two parallel lines cut by a transversal, so they are congruent.

x = 57


Related Questions

2) Kelly had a picnic each year to celebrate her birthday. The 1st year 50 people came. The 2nd year 30 people came. What is the percent of decrease?​

Answers

Answer:

40%

Step-by-step explanation:

Answer:

40%

Step-by-step explanation:

n
Which function is shown in the graph below?
y
10
8
6
4
2
-10 -8 -6 -4 =22
2.
4
B
8-10 x
-6
-8
-10
(1)x+3

Answers

Answer:

Step-by-step explanation:

The solution is, The answer for this case is given by:

y = 2 ^ (x + 2) +3

option 2

What is function?

Function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable.

here, we have,

For this case we observe the cut point with the y axis in:

(0, 7)

The function that complies with this is:

y = 2 ^ (x + 2) +3

We have then:

y = 2 ^ (0 + 2) +3

y = 2 ^ (2) +3

y = 4 + 3

y = 7

Answer:

The answer for this case is given by:

y = 2 ^ (x + 2) +3

option 2

To learn more on function click:

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My friend owns her own store. She gets her clothing for
$24 a piece. She sells them at her store for $49.99. What
is her percent increase?
Round to the nearest percent.
O 48%
O 51%
O 8%
O 108%

Answers

Answer:

108 %

Step-by-step explanation:

Answer:

51%

Step-by-step explanation:

(Amount of change/original value)

25.99÷49.99=0.51

A system of linear equations is shown x-4y=1, 3x+2y=-11 what is the solution to the system of equations

Answers

Answer:

x= -3 , y= - 1

Step-by-step explanation:

hope I was able to help:)

adding and subtracting polynomials

Answers

Answer:

[tex]3x^{2} + 3x +12[/tex]

Hope that helps!

Step-by-step explanation:

anyone help me i really need it anyone helpful

Answers

Answer:

(photo)

Step-by-step explanation:

Since the b in the format is +3 you would have to graph it on the positive three on the y axis then you graph the rise/ run which is 3x

Find Four Numbers that form a geometric progression such that the second term is less than the first by 35, and the third term is greater than the fourth term by 560. (Note: there should be 3 different possible geometric sequences)

Answers

Answer:

-35/3, -140/3, - 560/3, -2240/37, -28, 112, - 448  

Step-by-step explanation:

The terms are:

a₁, a₂, a₃, a₄

Given:

a₁ = a₂ + 35a₃ = a₄ + 560

Use the nth term formula:

a₂ = a₁ra₃ = a₁r²a₄ = a₁r³

Substitute:

a₁ = a₁r + 35 ⇒ a₁(1 - r) = 35a₁r² = a₁r³ + 560  ⇒ a₁(1 - r)r² = 560

Divide the second equation by the first:

r² = 560/35r² = 16r = √16r = ± 4

Use the first equation to find the first term:

a₁( 1 ± 4) = 351. a₁ = 35/-3 = -35/32. a₁ = 35/5 = 7

We have two sequences:

r = 4

-35/3, -140/3, - 560/3, -2240/3

r = -4

7, -28, 112, - 448  

You purchase a t-shirt for $9.55 and a pair of jeans for 18.12 from Old Army at 7% sales tax.

How much change should you receive if you give the cashier two twenty-dollar bills?

Answers

Answer:

$10.39 is the change

Step-by-step explanation:

We start by calculating the total score

9.55 + 18.12 = 27.67

we now calculate the sales tax

This is 7% of the total

= 7% of 27.67

7/100 * 27.67

= $1.94

The total now comes;

1.94 + 27.67 = $29.61

The total was 2 * 20 = $40

The change was;

$40 - $29.61 = $10.39

A machine fills 75 bottles of water each minute. Write an equation to represent the number of bottles b of water the machine can fill in m minutes.

Answers

Answer:

b = 75m

Step-by-step explanation:

75xm=b your welcome unless you need a different letters

Find the additive inverse of each linear expression
1. 3x - 6
2. -9x + 3
3. -4x -8

Answers

Step-by-step explanation:

G(x) = 2/3 x - 6     switch x and y around and solve for y.

y = 2/3 x - 6

x = 2/3 y - 6

x + 6 = 2/3 y

3/2  x + 9 = y

PLS HELP WILL MARK BRAINLIST

Answers

Answer:

T=39.46

Step-by-step explanation:

13(t+13)=676

multiply 13 by t and by 13

then you will have 13t + 169=676

isolate the variable

13t + 169= 676

substract 169 from both sides

13=507 divided both side by 13

T=39

........

some people might need to hear this. lot of us are struggling in school rn, but I am proud of any progress you have made.
have a great day!:)​

Answers

Answer:

hi thx................

a skier is going down a slope that measures 3,500 feet long. by the end of the slope, the skier has dropped 1,400 vertical feet. to the nearest degree, what is the angle, A , of the slope?​

Answers

Opposite over hypotenuse
1400/3500=0.4=40 degrees
I believe that is the answer

I need some help with this please

Answers

X=6.75

3+x=5x-24 Add 24 on both sides
27+x=5x Subtract 1x on both sides
27=4x Divide 4 on both sides
6.75=x You Can double check by plugging in x

1
How many cubes with side lengths of
em does it take to fill the prism?
cm
2
alon
cm
1 cm
cubes

Answers

4 cubes at leastb right

Mr. Fry is building a fence around his pool.

•Length of the fence is 60 feet.
•Width of the fence is 30 feet.

How many yards of fence will Mr. Fry build?

Answers

Answer:

30 yards of fence

Step-by-step explanation:

First, convert 60 feet to yards and 30 feet to yards. Remember, 1 foot= 3 yards.

60/3= 20 yards

30/3= 10 yards

Then you add the length and the width of the fence (in yards) to find the total yards of fence.

20+ 10= 30 yards of fence

The fence around his pool will be 30 yards long

Book price $ 60. The book went up in price on the 15th
%.
What is the price of the book after the price increase?

Answers

Answer:

$69

Step-by-step explanation:

Price of book after the price increase

= 60 + 15% of 60

= 60 + 0.15*60

= 60 + 9.0

= $69

A ladder needs to reach a second-story window that is 15 feet above the ground and make an angle with the ground of 71°. How far out from the building does the base of the ladder need to be positioned? Round your answer to the nearest tenth.


The base of the ladder needs to be ______ feet away from the wall.

Answers

Answer:

5.2 feet

Step-by-step explanation:

It helps if you can make a drawing.

You are looking for the adjacent side of the 71° angle in a right triangle and 15 is the opposite side of the angle.

Let x = the distance from the building to the base of the ladder

Tan 71 = 15/x

xtan71 = 15

x = 15/tan 71 = 5.2 feet

Simplify the expression.
-4i(2+3i)

Answers

Answer:

-8i + 12

Step-by-step explanation:

-4i(2 + 3i) = -8i - [tex]12i^{2}[/tex] = -8i - 12 * (-1) = -8i + 12

Answer:

12−8i

Step-by-step explanation:

-(-4 *3+4*2i)

-4*3=12

4*2=8

=12-8i

Market researchers were interested in the relationship between the price of bobbleheads and the demand of bobbleheads. Information was collected from a survey and used to obtain the regression equation ŷ = –0.227x + 50.455, where x represents the price of bobbleheads (measured in dollars) and ŷ is the predicted demand of bobbleheads (in units). What is the predicted demand of a bobblehead that has price of $6.00?


–1.362 units

49.093 units

51.817 units

195.837 units

Answers

Answer:

49.093

Step-by-step explanation:

Given the regression equation :

ŷ = –0.227x + 50.455

x represents the price of bobbleheads (measured in dollars)

ŷ is the predicted demand of bobbleheads (in units).

Preductwd demand ; when x = 6

ŷ = –0.227(6)+ 50.455

= 49.093

2x + 9y = -7
6x - 3y = 9

Answers

Answer:

Add the equations together

Step-by-step explanation:

The reason why I know this is because they are all like terms so that would be the smartest choice to do first.

If this answer helped you then please mark it as brainliest so I can get to the next rank

HELP ME 7th grade math
Find the surface Area

Answers

Answer:

30.24

Step-by-step explanation:

I times the base by the height then divided by 2

The surface is 47 degrees beside 57
So it’s 97 B.

Which measurement is closest to the area of the circle in square centimeters ? A. 31.4cm² B. 78.5cm² C.62.8² D.50.2cm²​

Answers

Answer: it’s a

Step-by-step explanation: took the test got it right

The required measurement closest to the area of the circle in square centimeters is 78.5cm². Option B is correct.

What is an area circle?

The area of the circle is given by the pie times square of the radius.

Area of circle = πr^2

Here,
Let the radius of the given circle be r = 5 cm
Area of the circle = πr²

Substitute the value in the above expression,
Area of the circle = π 5²
Area of the circle = 78.5cm²

Thus, the required measurement closest to the area of the circle in square centimeters is 78.5cm². Option B is correct.

Learn more about circle here:

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True or False: The formula to derive pi is: pi = circumference divided by radius

Answers

False, to get pi is pi= circumference divides by diameter

convert the following fractions so that's the denominator is 100 15/20​

Answers

Answer:

75/100

Step-by-step explanation:

15/20 = x/100

20x = 1500

x = 1500/20

x = 75

Calculate the gradient of the line using rise/run method.

Answers

Given:

The graph of line.

To find:

The gradient of the line using rise/run method.

Solution:

We know that the gradient of a line is also known as slope.

[tex]Slope=\dfrac{Rise}{Run}[/tex]

Consider the two intercepts, then rise is distance between origin and y-intercept and run is the distance between origin and the x-intercept. But rise must be negative because the value of y decreased from 3 to 0.

[tex]Rise=-3[/tex]

[tex]Run=2[/tex]

Now,

[tex]Slope=\dfrac{Rise}{Run}[/tex]

[tex]Slope=\dfrac{-3}{2}[/tex]

The gradient of the line is [tex]-\dfrac{3}{2}[/tex].

Therefore, the correct option is C.

Multiplying by 0.51 is the same as decreasing by___%

Answers

The answer for your question is 10% hope this helps you

Answer:

The correct answer is 51%

Help me please!!!!!!!

Answers

Answer:

900 cubes with side of 1/10 ft will fill the prism completely for a total volume of 9/10 ft ³

Answer:

total volume=l×b×h=1 1/2×1 1/5×1/2=3/2×6/5×1/2

=18/20=9/10ft³

I think

Compare multiplying a number by 3 and by 1 third. *

Answers

Answer:

Multyplying by 1 third is the same as dividing by 3, so it's the opposite as multiplying by 3.

A local hamburger shop sold a combined total of 568 hamburgers and cheeseburgers on Sunday. There were 68 more cheeseburgers sold then hamburgers. How many hamburgers were sold Sunday.

Answers

Answer:

250 hamburgers were sold on Sunday

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