A ball is thrown from a height of 61 meters with an initial downward velocity of 6m/s. The ball's height after seconds is given by the following. h=61-6t5t^2. How long after the ball is thrown does it hit the ground?

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?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

It says factor each expression completely 8y+48