Answer:
z=10
10-5z=-4z
10=-4z+5z
10=z
C. 48
Step-by-step explanation:
first you solve 84 divided by 7 and your answer is 12 then you do 12x4 which is 48
v=pi.r^2.h
1728=3.14*22r^2
1728/69.08=r^2
r^2=25.0144
r=5
