Dear Westbrookalisha, your question is very vague. I don't see the worksheet or the problem you want us to solve.
Perimeter of rectangle:
P = 2(L + W)
P = 250 (given)
L = 3W - 35 (given)
250 = 2(3W -35 + W) ↔ 125 = 4W - 35
4W = 125 +35 =160 And W = 40 ft
And L = 3x40 - 35 = 85 ft
Answer:

Step-by-step explanation:
We want to find the equation of a parabola with vertex (0,5), focus at (0,7) and directrix y=3.
This is given by 
where p=2, h=0, and k=5
We substitute these values to get:

This simplifies to:

We solve for y to get:

I believe the answer would be 70 but make sure just in case.