Answer:
It will take 2 hours, 13 minutes and 20 seconds for both pipes to fill the pool.
Step-by-step explanation:
Given that an inlet pipe can fill an empty swimming pool in 5hours, and another inlet pipe can fill the pool in 4hours, to determine how long it will take both pipes to fill the pool, the following calculation must be performed:
1/5 + 1/4 = X
0.20 + 0.25 = X
0.45 = X
9/20 = X
9 = 60
2 = X
120/9 = X
13,333 = X
Therefore, it will take 2 hours, 13 minutes and 20 seconds for both pipes to fill the pool.
Step-by-step explanation:
Answer is in the photo with diagram
Answer: The projectile reaches its maximum height after 20 seconds.
Step-by-step explanation:
Given the function:

You can following formula (which gives the x -coordinate of the vertex of the parabola) in order to find after how many seconds the projectile takes to reach its maximum height:

In this case you can identify that the values of "a" and "b" are:

Then, substituting values into the formula, you get the following result:

Therefore,based on this, the conclusion is: The projectile reaches its maximum height after 20 seconds.
Answer:
4x−5y=−10 hopefully this helps