12. x + y = 4 And the next question is
13. -7 x = y
Pls answer ASAP and explain why

Step-by-step explanation:

Since we know -7x=y we use the substitution method and plug it in the top equation.

or x=-2/3

Then plug it back in the the bottom equation

y=14/3

2.

according to newton’s cannonball model, what happens if the cannonball's velocity is enough to overpower the pull of earth’s gravitystep-by-step explanation:

step-by-step explanation:

if you meant, "on the way from (3, 2) to (3, 14):

x does not change; y increases by 12.

ensure that you have copied down this problem correctly.   .