Answer:
gravitational potential energy
Step-by-step explanation:
cuz its being lifted
x = 4; y = 8
y=2x
y=x+4
2x = x + 4
x = 4
y = 2x = 2(4)
y = 8
Solution: x = 4; y = 8
Answer is a
±11
11*11=121
-11*-11=121