Ican't figure out how to do either one of

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

What statement is true? 2x^2-9x+2=-1

Aline passes through 3,7 and 6,9 what equation represents the line