Question

A=.5h(B+b); A=15, B=2, b=3
it's asking for the unknown variable

Answer 1

Explanation:

That is the area of a trapezoid

A=h(b1+b2)/2

We are given everything but the height so

h=(2A)/(b1+b2), now using the values given to us we have

h=(2(15))/(2+3)

h=30/5

h=6