Use addition to solve the linear system of equations. Include all of your work in your final answer. -x-y=4 x+2y=4

x=-12, y = 4

Step-by-step explanation:

-x-y=4

x+2y=4

Add the equations together to eliminate x

-x-y=4

x+2y=4

0x + y = 8

y = 8

Now find x

x + 2y = 4

x +2(8) = 4

x +16 = 4

x = 4-16

x = -12

a box 3 3/4 feet long or 4+ feet.

step-by-step explanation:

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1