Answer:
t = 4 seconds
Step-by-step explanation:
The height of a soccer ball as a function of time is given by :

We need to find the time when the ball hit the ground i.e. h = 0
Put h = 0 in above equation. So,

It is a quadratic equation such that,
t = -1 s and t = 4 s
Neglecting -1 s, the ball will hit the ground after 4 seconds.
Answer: x=−3 or x=13
Step-by-step explanation:
Step 1: Subtract 39 from both sides.
x2−10x−39=39−39
x2−10x−39=0
Step 2: Factor left side of equation.
(x+3)(x−13)=0
Step 3: Set factors equal to 0.
x+3=0 or x−13=0
x=−3 or x=13
Answer:
2(x-4)=3(x+10)
Step-by-step explanation: