Answer:
3
Step-by-step explanation:
z/12=18/72 z/12=1/4 z=3
21*9
9 sides times 21 per side
Answer:
8x^2
Step-by-step explanation:
(2x)^2(3−1)
= 4x^2(2)
= 8x^2
(x-center)^2+(y-center)^2=r^2
x^2+y^2=r^2
(7)^2+(0)^2=r^2
49+0=r^2
r^2=49, r=7
x^2+y^2=49
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