The answer I believe is -3x + 20-9x+16
Answer:
318 feet.
Step-by-step explanation:
We have been given that a girl drops a ball off a cliff into the ocean. The polynomial
gives the height, in feet, of the ball t seconds after it is dropped from a 350 ft tall cliff. We are asked to find the height in feet after 2 seconds.
To find the height after 2 seconds, we will substitute
in our given equation as:




Therefore, the height will be 318 feet after 2 seconds.
Answer:

And for the coordinate on y we can use the function like this:

Then the vertex would be 
Step-by-step explanation:
For this problem we have the following function given:

That represent a quadratic function and the general form is given by:

For this problem a =-1 , b= 50 , c=-456 and we can find the corrdinate of the vertex in x with this formula:

And replacing we got:

And for the coordinate on y we can use the function like this:

Then the vertex would be 