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2 years ago

Lydia writes the equation below with a missing value.

Mathematics

2 answers:

DanielleElmas [232]2 years ago

7 0

Answer:

Step-by-step explanation:

Alex73 [517]2 years ago

3 0

If she puts 0 in the box she would have a direct variation.

Lydia writes the equation y = 5x - __ with a missing value.

She puts a value in the box and says that the equation represents a direct variation.

We have to choose the correct option from the given options that explain that the equation could represent a direct variation.

When two variables are such that one is a constant multiple of the other, we said they are in Direct variation.

<h3>What is the direct variation?</h3>

In form of y = ax, where y and x are in direct variation.

Consider the given equation y = 5x - __

For the equation to be in direct variation the value of the missing term has to be 0.

then the equation becomes,

y = 5x

Thus, If she puts 0 in the box she would have a direct variation.

Option (a) is correct.

To learn more about the direct variation visit:

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Eric is twice as tall as his little brother Kevin. Kevin is also three feet shorter than Eric. If we let E=Eric's height and let

podryga [215]

Answer:

The 2 equations are E = 2K and K = E-3

Step-by-step explanation:

Let the height of Eric be E

Let the height of Kevin be K

Eric is twice as tall as his little brother Kevin

E = 2K

Kevin is also three feet shorter than Eric

K = E-3

The 2 equations are E = 2K and K = E-3

8 0

4 years ago

The six faces of a cube are painted black. The cube is then cut into <img src="https://tex.z-dn.net/?f=5%5E3%20%3D%20125" id="Te

Rasek [7]

Answer:

The probability that a randomly selected small cube is rolled and the face on the top is black is P=0.2.

Step-by-step explanation:

We have a cube, with the faces painted black, that each side is divided in 5, so we end up with 125 cubes.

We have to calculate the probability that a randomly selected cube is rolled and the face on the top is black.

This probability is equal to the proportion of black area in the total area of the cube.

We can define the side of the original cube as A=5a, being a the side of the small cubes.

The area that is painted black is equal to the sum of 6 squares of side A. In terms of a, that is:

$S_b=6\cdot A^2=6\cdot(5a)^2=6\cdot25a^2=150a^2$

The total area of the 125 small cubes is:

$S=125(6a^2)=750a^2$

Then, the ratio of black surface to the total surface is:

$s_b/s=(150a^2)/(750a^2)=0.2$

Then, we can conclude that the probability that a randomly selected small cube is rolled and the face on the top is black is P=0.2.

7 0

4 years ago

What is 1/4 of 76 in a mathequ on

Softa [21]

The answer is 19. You have to do 1/4 x 76/1 which is basically 76 divided by 4, which gives you 19.

4 0

3 years ago

Find the unit rate.<br> 20 miles in 2 minutes = ___<br> miles per minute

Damm [24]

Answer:

10 mpm

Step-by-step explanation:

20 / 2 = 10

3 0

3 years ago

Read 2 more answers

Can some on help me on this question?

mario62 [17]

Answer:

x=10 and x-7 is the answer

Step-by-step explanation:

a)2x-7=13

2x=13+7

2x=20

x=20/2

x=10

b)3x+4=25

3x=25-4

3x=21

x=21/3

x=7

i hope it will help you

6 0

3 years ago

Read 2 more answers