Matthew borrows $200, agreeing to pay it back with a 6% annual interest after 20 months. How much interest will she pay?

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

X+ y = 5 ; x - y =3 solve using linear combination

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.