Answer:
A
Step-by-step explanation:
That's the formula for the solution of a quadratic equation, like this:

The formula is:

In your case:

The only answer that has c = -2 is the first one, A.
If you move the 5 to the left-hand side, it becomes -5 and with the +3 gives a -2.
F(x) would be x value
Solution would be y value
a. (-1,1)
b. (2,7)
c. (1,-1)
c. (2,0)
Answer:
5 ft
Step-by-step explanation:
Since we have a rectangle, we know for sure that perimeter = double the width and double the height. Algebraically, that looks like:
P = 2W + 2H
Let's sub in the given values, P and W:
18 = 2(4) + 2H
Now, let's solve for the height, H:
18 = 8 + 2H
10 = 2H
10/2 = H
<u>5 = H</u>
I hope this helps!