Amy baby-sat from 7:30 p. m. to 11:00 p. m. If Amy was paid $15.75, how much did she earn per hour?

When can u say there is no solution for a system of linear inequalities? explain your answer and show with a system and graph

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?

The area of square garden is 300m squared. how long is the diagonal?