On average, there are 1 1/2 units of a new cleaning product sold every 1/60 of an hour. If this rate continues, what is the unit rate of products sold?

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?

Solve 2x+y=3 x+y=5 in substitution method

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?