If pq=x-5, qr = 2x -1, and pr =21, find x
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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?

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute