12. B step 3
When they added the equations, they forgot a term on the right side.
13. g=w+8, g=w-4 C i think
If g is 8 more than w, then g=w+8
If g is 4 less than w, then g=w-4
Answer:
738π cm^3
1458π cm^3
Step-by-step explanation:
The volume of a cylinder is V = πr^2 h, where r=radius and h=height.
a) V = πr^2 h
= π6^2 20.5 = 36*20.5π = 738π cm^3
b) V = πr^2 h
For this one, remember that diameter is half of radius. d = 18, r = 9.
V = π9^2 18 = 81*18π = 1458π cm^3
X = 4
Y = 5
As for the other two problems... I'm sorry but they slipped my mind. Apoligies!
