Answer:
The answer is b = ax- c/x
when i put the / it means fraction
It is B.
This is because the formula for area of a triangle is A=1/2bh
323 = 1/2 (38) h
323= 19h
323/19 = 17
For #11, the answer is the tall sipper thing. The formula for area in a cylinder is r squared times height. you did diameter squared, not radius squared