Which of the following values for m proves that 2m + 2m is not equivalent to 4m2? m = 0 m = 1 m = 2

When m=0 ,

2m+2m=2(0)+2(0)= 0

When m=1 ,

2m+2m=2(1)+2(1)=2+2=4.

When m=2

2m+2m=2(2)+2(2)=4+4=8.

Both expressions are not equivalent when m=2.

2x + 8y = 4
x = -3y + 5

plug in the value of x, from the second equation, into the first
2(-3y + 5) + 8y = 4
-6y + 10 + 8y = 4
combine like terms
2y + 10 = 4
subtract 10
2y = -6
divide both sides by 2
y = -3

then, plug what you got for y into one of the equations
x = -3y + 5
x = -3(-3) + 5
x = 9 + 5
x = 14

Hope this helps!