So area is base x height:
5(x+2)=20
5x+10=20
5x=10
x=2
its A
Answer:
Only D,F, and G are perfect cubes.
Step-by-step explanation:
A) Technically not a perfect cube.
B) Not a perfect cube
C) Not a perfect cube
D) Yes. 3*3=9
E) Not a perfect cube
F) Yes. 8*8=64
G) Yes. 10*10=100
H) Not a perfect cube
12 because I took the test