Question

An advertisement claims that a 5-pound box of detergent will wash 20 loads of laundry. A 5-pound box costs $3.50. A 15-pound box costs $10.00. How much will you save PER LOAD if you buy the 15-pound box? (Round all answers to the nearest tenth of a cent.)

Answer 1

a 15 pound box would save you more money than three 5-pound boxes, for 3x3.50 = $10.50 for the 5 pounds and
1x10 = $10 for the 15 pounds

you would spend 50 more cents buying three 5-pound boxes then if you just buy a 15-pound box