If x = 1/4 and y = 8 then how do you evaluate these expressions?

1. 3xy

2. 16x + 5y

3.

4. 2(10 - 24x) + y

Which is the correct first step in finding the area of the base of a cylinder with a volume of 26x cubic meters and a height of 6.5 meters? v=bh 6.5=b(26x) v=bh v=26pi+(6.5) v=bh v=26pi(6.5) v=bh 26pi=b(6.5)