# algebra 1

posted by
**Maram** on
.

The area of trapezoid is h( b1+b2)/5,

where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the lenghth, in inches, of its other base?