Fine the unit rate 730 miles in 20 miles

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

What is the binomial expansion of (2x-3)^5

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.