You find this value by factoring. Factoring finds the zeros of the function. When the ball hits the ground, it has 0 height. Therefore, when the function goes through the x axis, it has a y value of 0. That means that when y = 0, the ball has hit the ground. Use the quadratic formula to factor

. Notice I rearranged the terms. When you factor that you get zeros of -3.19 and 2.19. The two things in math that will never EVER be negative are time and distance/length. Therefore, that tells us that the ball hits the ground 2.19 seconds after it was thrown.
Answer:
Hopefully help
Step-by-step explanation:
the answer in the picture
If he used half as many hot dog buns, he used 6 bags of <span>hot dog buns on Thursday. </span>
Answer:
x=9
Step-by-step explanation:
2x+10=28
2x=18
x=9