Which is greater 83 feet or 786 inches

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Which term applies to agb and dge? a. obtuse b. supplementary c. complementary d. vertical