8th grade math homework, I need help

8th Grade Math Homework, I Need Help

Answers

Answer 1

Answer:

c = √18

Step-by-step explanation:

c² = 3² + 3² = 18

so c = √18 = 3√2 ≈ 4.24


Related Questions

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Which point lies in quadrant Il on the coordinate plane?
O A. (2,4)
B. (2,-4)
OC (-2,4)
OD. (-2,-4)

Answers

Answer:

(2,4)

Step-by-step explanation:

The scatterplot below shows the number of hours of sleep that 4 teenagers got before taking the SAT and the average response time in
seconds it took for those teens to answer each question.

Using the equation of the line of best fit, how many hours of sleep would you expect a teen to get to have a response time of 46 seconds?
A 7.25 hours
B 9.31 hours
C 13 hours
D 60.76 hours

Answers

The answer is B because 9.31 is correct

Answer:

B

Step-by-step explanation:

What is the slope of the line shown in the graph?

1) -1
2) -2
3) -1/2
4) 2

Answers

I believe it would be -2 since you use rise over run. That would be -2/1

Find the value of x in the triangle shown below

Answers

Answer:

x = 50

Step-by-step explanation:

Since the 2 legs are congruent, both 7, then the triangle is isosceles and the 2 base angles are congruent, then

x = [tex]\frac{180-80}{2}[/tex] = [tex]\frac{100}{2}[/tex] = 50

Emily has 2 coins. If Emily flips both the coins at once, how many possible outcomes are in the sample space?

Answers

Answer:

I think it's 4 and why do I have to write 20 letters?

Which number has the greatest absolute value?

Answers

Answer:

|-8|

if you are happy with my answer, please give brainliest :)

Step-by-step explanation:

Absolute value of -8 is 8, which is greater than the other values.

 

2nd one i believe

Step-by-step explanation:

Write the equation of the line which contain the point (1, 2) and slope = - 4 .

Answers

Step-by-step explanation:

y=mx+c

2=(-4)(1)+c

2=-4+c

c=2+4

c=6

therefore the answer is...

y=-4x+6

Look at pic please :)

Answers

Answer:

x = 32

Step-by-step explanation:

(4) x/4 = 8(4)

YOu want to find x so multiply to take 4 out.

What value of x makes this equation true?
0.6x – 5 = 0.1x + 7

Answers

Answer:

x=24,sorry if im wrong:/

Step-by-step explanation:

Answer:

24

Step-by-step explanation:

0.6x - 5 = 0.1x + 7

-0.1x          -0.1x

0.5x - 5 = 7

       +5     +5

0.5x = 12

(2)0.5x = 12(0.5)

x=24

3. Simplify the expression

Answers

Answer:

c

Step-by-step explanation:

yaal yw.

On an average Saturday, 20% of tickets sold are child tickets. If there were 460 tickets sold on Saturday, then how many were sold to children?

Answers

Answer:

92

Step-by-step explanation:

20% of 460 tickets is 92

Answer:

92 tickets were sold to the children.

Step-by-step explanation:

To find the number, I multiplied 20% by 460, where I got 92.

D
Question 18
2.5 pts
In an exothermic reaction, the energy of the reactants is greater than the energy of the
products. Which of the following best explains the difference in energy between the
reactants and products?
Chemical energy from the reactants is destroyed during the reaction
Ambient energy is converted to chemical energy during the reaction
Chemical energy from the reactants is released as heat.
Chemical energy in the products is created during the reaction

Answers

Hi :) no te entendí la verdad lo siento

What is the equation in slope-intercept form of the line that passes through the point (12, 5) and is perpendicular to the line represented by y=34x−8?

Answers

Answer:

The equation in slope-intercept form of the line that passes through the point (12, 5) and is perpendicular to the line is:

[tex]y=-\frac{1}{34}x+\frac{91}{17}[/tex]

Step-by-step explanation:

We know the slope-intercept form of the line equation

[tex]y=mx+b[/tex]

where m is the slope and b is the y-intercept

Given the line

[tex]y=34x-8[/tex]

comparing with the slope-intercept form of the line equation

The slope m = 34

We know that a line perpendicular to another line contains a slope that is the negative reciprocal of the slope of the other line, such as:  

slope = m = 34

Thus, the slope of the the new perpendicular line = – 1/m = -1/34 = -1/34

Using the point-slope form

[tex]y-y_1=m\left(x-x_1\right)[/tex]

where m is the slope of the line and (x₁, y₁) is the point

substituting the values of slope = -1/35 and the point (12, 5)

[tex]y-y_1=m\left(x-x_1\right)[/tex]

[tex]y-5=-\frac{1}{34}\left(x-12\right)[/tex]

Add 5 to both sides

[tex]y-5+5=-\frac{1}{34}\left(x-12\right)+5[/tex]

[tex]y=-\frac{1}{34}x+\frac{91}{17}[/tex]

Therefore, the equation in slope-intercept form of the line that passes through the point (12, 5) and is perpendicular to the line is:

[tex]y=-\frac{1}{34}x+\frac{91}{17}[/tex]

the diagram shows a circle in a square 6cm calculate the shaded area take pi to 3.142

Answers

The question is incomplete (as there's no attachment to support the question).

However, I'll base my calculations base on the attached diagram to this solution.

Answer:

Shaded Area = 7.722 cm²

Step-by-step explanation:

Given.

Side of the square = 6cm

π = 3.142

Required:

Area of shaded region

First, the area of the square needs to be calculated.

Area of a square = Length * Length

Area = 6cm * 6cm

Area = 36cm²

Then we calculate the area of the circle.

To calculate this, we need to get the radius of the circle.

If the length of the sides of the square is 6 cm, then the diameter of the square is also 6 cm.

Now that we have the diameter, the radius can be calculated.

Radius, R = ½D (where R and D represent radius and diameter, respectively)

So,

R = ½ * 6 cm

R = 3cm

Area of a circle = πr²

Area = 3.142 * 3²

Are = 3.142 * 9

Area = 28.278 cm²

The shaded area is then calculated by subtracting the area of the circle from the area of the square.

Shaded Area = Area of Square - Area of Circle

Shaded Area = 36cm² - 28.278cm²

Shaded Area = 7.722cm²

Hence, the shaded area 7.722 cm²

The question is incomplete (as there's no attachment to support the question).

However, I'll base my calculations base on the attached diagram to this solution.

Answer:

Shaded Area = 7.722 cm²

Step-by-step explanation:

Given.

Side of the square = 6cm

π = 3.142

Required:

Area of shaded region

First, the area of the square needs to be calculated.

Area of a square = Length * Length

Area = 6cm * 6cm

Area = 36cm²

Then we calculate the area of the circle.

To calculate this, we need to get the radius of the circle.

If the length of the sides of the square is 6 cm, then the diameter of the square is also 6 cm.

Now that we have the diameter, the radius can be calculated.

Radius, R = ½D (where R and D represent radius and diameter, respectively)

So,

R = ½ * 6 cm

R = 3cm

Area of a circle = πr²

Area = 3.142 * 3²

Are = 3.142 * 9

Area = 28.278 cm²

The shaded area is then calculated by subtracting the area of the circle from the area of the square.

Shaded Area = Area of Square - Area of Circle

Shaded Area = 36cm² - 28.278cm²

Shaded Area = 7.722cm²

Hence, the shaded area 7.722 cm²

apply properties of operations to write an equivalent expression. +++

Answers

Answer:

uhhh

Step-by-step explanation:

good luck my mane man

solve a package of 17 sliced apples $2.21.How much would a package with 25 sliced apples cost at the same price per slice?????solve pleaseee middle school

Answers

Answer:

$3.25

Step-by-step explanation:

So,

If a package of 17 sliced apples is $2.21, lets find out the price per apple.

2.21 / 17 = 0.13

so, the price per apple is $0.13

Now, we find the price of a package with 25 sliced apples.

0.13 x 25 = 3.25

So, the price of a package with 25 sliced apples is $3.25

Hope this helps!

The price is 3.25 I think

What property justifies the statement below?
1/2(4x+10)-16 = 2x+5-16
A. Associative Property
B. Identity Property
C. Inverse Property
D. Distributive Property

Answers

Answer:

A

Step-by-step explanation:

Tamu ran 30 minutes and burned 170 calories.
Part A
Which equations can be used to find the average number of calories, c, burned per minute? Select each correct answer.
□ A. 30c = 170
□ B. 170c = 30
□ C. c = 170 ÷ 30
□ D. c = 30 ÷170
□ E. 30
170 = c
□ F. 170
30= c

Answers

Answer:

it's C.

Step-by-step explanation:

Helppppppppppppppppooop

Answers

it should be 715, i don’t understand why that isn’t one of the choices.
you’re supposed to multiply everything

An artist is asked to scale up a model of Pluto to 3 times its original size. If the original model of Pluto has a radius of 12 cm, what is the volume of the new model?

Answers

Answer:

72

Step-by-step explanation:

24 times 3 is 72

Answer:

The volume of the new model of Pluto is 195,432.20 cm^3

Step-by-step explanation:

new radius: 12 * 3 = 36 cm

volume: V=4/3 * π * r^3

volume of new mode is 195,432.20 cm^3

What expression is equivalent to 30 divided (3 + x)

Answers

Answer:

the second one

Step-by-step explanation:

30/ (3+x)

Jim works in real estate sales. His annual salary is
$20,000 plus 2.5% of his home sales. What was the total
value of all homes he sold if his annual pay for the year
was $120,000?


Helppppp

Answers

Answer:

4,000,000

Step-by-step explanation:

We start by subtracting his salary (20k) from his annual income. That means he got 100,000 from selling homes.

So, what is 100,000 2.5% of?

I used the equation:

100,000 = .025x

with x being the value of all the homes.

Just divide and conquer, and you end up with a final answer of 4 Million

x ÷ 9 = 4 I dont know what this answer is?

Answers

Answer:

36

Step-by-step explanation:

9*4=36

Answer:

36

Step-by-step explanation:

9x4=36

36 divided by 9=4

I don’t understand please help?

Answers

On the top row the square root of 9 is 3 and 3 cubed is 27. On the bottom row you have to find 9 squared which is 9 x 9 which is 81.

If the volume of a cylinder is 900 cm squared with a height of 20 cm, what
is the diameter of the cylinder? Round to the hundredths.

Answers

Answer:

The diameter is 7.6 cm

Step-by-step explanation:

Mathematically, the volume of a cylinder can be calculated using the formula;

V = pi * r^2 * h

From the question;

V = 900

r = ?

h = 20

Substituting these values

900 = 3.142 * r^2 * 20

r^2 = (900)/(3.142 * 20)

r^2 = 14.32

r = √14.32

r = 3.78 cm

Mathematically, the diameter is 2 times the radius

We have this as;

2 * 3.78 = 7.6 cm

16 - x = -18
A. x = -18
B. x = -14
C. x = 14
D. x = 18

Answers

Answer:

None of these are correct? The correct answer is 34.

Step-by-step explanation:

Subtract 16 from each side, you get -x=-34

multiply each side by -1, you get x= 34

Answer:

18 or -18 depending if that is -x or x

Step-by-step explanation:

Please help me. Due tonight.

Answers

Answer:

The sum of the interior angles of any triangle are equal to 180

therefore in this triangle, m<a+m<c+m<b=180

we know that 9x-26 and m<a are supplementary angles (meaning they add to 180) and therefore,

9x-26+a=180

9x+a=206

a=206-9x

(206-9x)+(2x-12)+(4x+43)=180

combine like terms

-3x+237=180

-3x=-57

x=19

if x=19 then we can substitue it in for c

4x+43=c

4(19)+43=c

c=119

Step-by-step explanation:

Find the unit rate. Ryan can mow 3/5 of the yard in 2
hours. How much of the yard can Ryan mow in one hour?

Answers

Answer:

3/10 of the yard in one hour

Step-by-step explanation:

[tex]3/5(1/2)=3/10[/tex]

Answer:

3/10 of the yard.

Step-by-step explanation:

What we know:

Ryan can mow 3/5 of a yard in 2 hours.

What we need to know:

How much of the yard Ryan can mow in 1 hour, so the unit rate.

How do we do this:

It's simple if you think about it.

Just divide 3/5 by 2 (or multiply by 1/2)

3/5 * 1/2

3/(5*2)

3/10 of the yard can be mowed in one hour.

The graph shows the change in the price of a stock over time.
с
D
B
Time
Identify the time intervals for which the stock price increased, decreased, or remained constant.
Move the intervals to the appropriate column in the table.
Stock Price Increased Stock Price Decreased Stock Price Remained constant
B
D

Answers

Answer:b,A,D

Step-by-step explanation:

Nancy is trying to decide which cell phone plan would be the right one for her. She has
narrowed her choices down to two, Spirit and Horizon. Spirit (s) has a fixed fee of $20 and an
additional charge of 5 cents per minute. Horizon (h) has no fee and charges 15 cents per minute.
Write two equations that could be used to determine the total cost for each plan for 300 minutes?
A. s = 5x + 20
h=15x

B. s = 0.05x + 20
h = 0.15x

C. s = 15x
h = 5x + 20

D. s = 0.15x
h = 0.05x + 20

Answers

The answer is A im pretty sure because it makes more sense
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