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:
now one will understand except you because you place the pictures where you cant see the first part
Answer:
47
Step-by-step explanation:
Here’s how you can set up the problem:
10 + 25d = 40 + 10d
(d means pages per days)
15d = 30
D = 2
So, the answer would be two days. You can check this by plugging it into the problem:
10 + 25(2) = 40 + 10(2)
10 + 50 = 40 + 20
60 = 60; correct!
Hope this helped! :)
Answer:
Johnny needs to score 98 on third test to raise average to 94
Step-by-step explanation:
Given that average of two tests is 92.
The score of next test has to be found that means there will be a total of 3 tests.
The average will be:
It is also given that he has to raise his average to 98
We have to use the average formula for finding the third value
So,
Hence,
Johnny needs to score 98 on third test to raise average to 94