Agrocery store bought milk for $2.80 per half gallon and stored it in two refrigerators. during the night, one refrigerator malfunctioned and ruined 12 half gallons. if the remaining milk is sold for $4.00 per half gallon, how many half gallons did the store buy if they made a profit of $60.00?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Which system of linear inequalities is represented by the graph?

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm