Algebra 1

$h=\frac{2A}{b}$; 8cm
$A=\frac{1}{2}bh$ Divide each side by $b$ $\frac{A}{b}=\frac{1}{2}h$ To get $h$ by itself, we have to pultiply by the reciprical of $\frac{1}{2}$ (which is 2). $h=\frac{2A}{b}$ For the second part of the problem, plug in the numbers given. $h= \frac{2\times28cm^{2}}{7cm}$ Simplify the fraction $h= \frac{2\times4cm^{2}}{1cm}$ Solve the equation $h=8cm$