Aball is thrown at 14.7 m/s from the top of a 88.2 meter tall building. the equation for the balls height s at time t seconds after the ball is thrown; s(t) = –4.9t2 + 14.7t + 88.2. how many seconds does the ball take to hit the ground?

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x