10^2 + 5^2 = Diagonal length. so, 100 + 25 = 125 diagonal length
B. seven minutes - because that is when the slope of the line is flat, which means he isn't moving.
Well, we just need to perform the operations:
- Multiplication:

- Subtraction:

- Addition:

- Division:

So, if you add all the numbers together you get

Or, if you prefer,

L=25
If the length is 25 yards then you use 50 yards of fencing for the length, this leaves ten yards for each width of fencing each.
10 yards is 15 yards less than 25 yards showing that this is the correct answer.