A gymnastics team bought 12 sweatshirts that cost $45 each. How much did the team spend in all?

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

Ineed no it anyone can see this

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.