$\begin{cases}-3x+4y=-20\\y=x-4\end{cases}\\\\\\-3x+4(x-4)=-20\\\\-3x+4x-16=-20\\\\x-16=-20\quad|+16\\\\x-16+16=-20+16\\\\\boxed{x=-4}\\\\\\y=x-4\\\\y=-4-4\\\\\boxed{y=-8}$

Answer C.

4 0

3 years ago

If you can do this please answer it.

denis23 [38]

Your answer would be rounded about 140 because first rectangle =108divided by 9 = 12 which was the the perimeter of the rectangle plus the 90 degree right triangle which was about 36 so there.

7 0

3 years ago

6+ (-x) + 2x + (-7) + 2x

sashaice [31]

Answer:

3x-1

Step-by-step explanation:

6 +(-x) +2x + (-7) + 2x=

6-x +2x -7 + 2x =

6-7+ 2x+2x-x=

-1 + 3x=

3x-1

7 0

3 years ago

The lines below are parallel. If the slope of the green line is -3, what is the slope of the red line?

natima [27]

Answer:

The lines would be equal, meaning the slope of the red line is also -3.

Step-by-step explanation:

SIMPLE:
Parallel lines have the same slope.

3 0

1 year ago