L=30in
w Width
in
P Perimeter
in
Width is 8 and perimeter is 76
In order to find b1 from your formula stated we need to do few calculations
A=hb1+hb2, as you wee I multiply h with both bases( b1 and b2)
I will subtract hb2 from both sides
hb1=A-hb2
now I will divide my new expression by h
b1=(A-hb2)/h
It is a because when squared the product ensues as such so A Is the value
