The height of a ball, in feet, that is thrown straight up and fall straight down is modeled by the quadratic function y = −16(x-1)^2 + 21 where x is time, in seconds. at the time the ball is thrown, how high is it above the ground? the ball is thrown from 1 foot above the ground. the ball is thrown from the ground. the ball is thrown from 21 feet above ground. the ball is thrown from 5 feet above ground.

For this equation, you'll need to set x to 0 and solve from there.

First step is to solve the parentheses and then square the answer. Your equation will look like this:

Next, you will multiply -16 and 1, and then add the product of that by 21. Your answer will be

In short, the ball is thrown from 5 feet above ground.

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.