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.
Step-by-step explanation:
2*10+((4+10)x8)/2
=20+14*8/2
=76 sq meters
Long division, use math way
<span>M=2.60b + 50
When b = 25
M = 2.60(25) + 50 = $115
Answer: Chris earns $115 for selling the 25 books.</span>
1. x is the number of feet, y is the number of inches
2. substitute means to replace a variable with a number
3. y = 12 (5) = 60 inches.