All categories

3 years ago

What is -3(3y-7)=21-9y

Mathematics

1 answer:

Nina [5.8K]3 years ago

6 0

Answer:

the equation is equivalent, y is any number

Step-by-step explanation:

-3(3y-7) = 21-9y

-9y + 21 = 21 - 9y

-9y = -9y

y=y

any number will satisfy y=y

You might be interested in

<img src="https://tex.z-dn.net/?f=what%20%5C%3A%20is%20%5C%3A%20the%20%5C%3A%20formula%20%5C%3A%20of%20%5C%3A%20volume%20%5C%3A%

rusak2 [61]

Answer:

volume of cylinder= πr²h

8 0

3 years ago

Read 2 more answers

In 72,165 give the value of the<br>digit in the thousands place?

DerKrebs [107]

Hi
hi
hi
h
h
h
h
h
h
h
h
h
h
h
h
h
h

ok

5 0

3 years ago

What was developed in 1883 by the railroad companies to standardize the transportation of goods across the nation?

uranmaximum [27]

Answer: standard time

Step-by-step explanation:

4 times zones one hour apart

7 0

3 years ago

Indicate in standard form the equation of the line passing through the given points, writing the answer in the equation

Kryger [21]

Answer:

$y + x - 6 = 0$

Step-by-step explanation:

Given

$M(0,6) \ and \ N(6,0)$

Required

Find the equation of the line

First, the slope of the line has to be calculated using the following formula;

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

$where\ (x_1,y_1) = (0,6) \ and \ (x_2,y_2) = (6,0)$

So, the equation becomes

$m = \frac{0 - 6}{6 - 0}$

$m = \frac{-6}{6}$

$m = -1$

The equation of the line can then be calculated using

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

$Using \ m = \frac{y - y_1}{x - x_1}$

$-1 = \frac{y - 6}{x -0}$

$-1 = \frac{y - 6}{x}$

Multiply both sides by x

$-1 * x = \frac{y - 6}{x} * x$

$-x = y - 6$

Add x to both sides

$x -x = y - 6 + x$

$0 = y - 6 + x$

Reorder

$y + x- 6 = 0$

$Using \ m = \frac{y - y_2}{x - x_2}$

$-1 = \frac{y - 0}{x - 6}$

$-1 = \frac{y}{x - 6}$

Multiply both sides by x - 6

$-1 * (x-6) = \frac{y}{x - 6} * (x-6)$

$-1 * (x-6) = y$

$-x+6 = y$

Add x - 6 to both sided

$x - 6 -x+6 = y +x - 6$

$0 = y + x - 6$

$y + x - 6 = 0$

Hence, the equation of the line is $y + x - 6 = 0$

3 0

3 years ago

A police car drives with a constant speed of 64 mph. How far can it travel in 2 hours?

azamat

Answer:

128 miles.

Step-by-step explanation:

The police car is driving at a constant speed of 64 mph so you simply have to multiply the rate by the time to get the distance.

64 * 2 = 128 miles

Hope this helps!

6 0

3 years ago