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2 years ago

The length of each side of a cube is x cm. If x is an interference,why can’t the volume of the cube equal 15 cm

Mathematics

1 answer:

slamgirl [31]2 years ago

5 0

we don't know what the value of "X" is, so therefore, we cannot conclude that it is 15 cm.

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a record store is having a sale during which all items will be sold at 25% less then marked prices. How much will a CD marked $1

BARSIC [14]

Answer:

$12

Step-by-step explanation:

If you're taking off 25% of the regular cost, "taking off" means subtracting. So if we subtract 25% OF 16, the word "of" means to multiply here. So our expression then becomes:

16 - .25(16)

16 - 4 = 12

So the CD will sell for $12.

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3 years ago

What is the equation of the line through (−2, −2) and (4, −5)?

Liono4ka [1.6K]

Answer:

y = -1/2x - 3

Step-by-step explanation:

slope: (y2-y1) / (x2-x1)

(-5 - -2) / (4 - -2)

(-5 + 2) / (4 + 2)

-3 / 6

- 1 / 2

y-intercept: y = mx + b

-5 = -1/2(4) + b

-5 = -2 + b

-3 = b

7 0

2 years ago

The slope, m, of a linear equation can be found using the formula m = StartFraction y 2 minus y a Over x 2 minus x 1 EndFraction

ExtremeBDS [4]

Answer: Third option.

Step-by-step explanation:

By definition, the slope of a line can be calculated with the following formula:

$m=\frac{y_2-y_1}{x_2-x_1}$

Since you need to solve for $y_2$ to find an equivalent expression, you can apply these steps:

1. You must multiply both sides of the equation by $(x_2-x_1)$ :

$m(x_2-x_1})=(\frac{y_2-y_1}{x_2-x_1})(x_2-x_1})\\\\m(x_2-x_1})=y_2-y_1$

2. Finally, you must add $y_1$ to both sides of the equation:

$m(x_2-x_1})+y_1=y_2-y_1+y_1\\\\y_2=m(x_2-x_1})+y_1$

3 0

3 years ago

Read 2 more answers

Write a rule for the function

cestrela7 [59]

Answer:-18

Step-by-step explanation: i know evertyhing

3 0

2 years ago

Suppose a video store charges non-members $4 to rent a video. A membership costs $21 and then videos cost only $2.50 to rent. Ho

densk [106]

Answer:

You need to rent 14 videos, and you'll pay the same amount for both. Renting 15 will make the membership a better method of payment.

Step-by-step explanation:

Let Number of videos to be rented be x;

Given:

For non members;

Cost of renting 1 video = $4

Cost for renting x videos = $4x$

For Members;

Membership cost = $21

Cost of renting 1 video = $2.50

Cost of renting x video = $2.5x$

We can create an equation. Say the number of videos you rent is given by x . We can write that, if we rent x videos without membership, we'll have to pay $4x$ . If we rent the same amount of videos with membership, we'll have to pay $21+2.5x$ .

Hence the equation can written as

$4x=21+2.5x\\4x-2.5x=21\\1.5x=21\\x=\frac{21}{1.5}=14$

Hence You need to rent 14 videos, and you'll pay the same amount for both. Renting 15 will make the membership a better method of payment.

5 0

2 years ago