Question

Marcie wants to enclose her yard with a fence. your yard is in the shape of a rectangle attached to a triangle. the formula for the area of the enclosed space is a = lw + 0.5bh. solve for
b.

Answer 1

Area = LW + 1/2 b * h          Subtract L*W from both sides.

Area - LW = 1/2*b*h             Multiply both sides by 2

2*Area - 2*LW = b*h            Divide by h

$\text{b} = \dfrac{2*A - 2LW}{h} =\dfrac{2A }{h} -\dfrac{2LW}{h}$