2. A. She mixed up the x- and y-values.

B. She used y-values where she should have used x-values.

C. She did not keep the order of the points the same in the numerator and the denominator.

D. She should have added the values, not subtracted them.

C. She did not keep the order of the points the same in the numerator and the denominator.

Step-by-step explanation:

She needs to switch 1 with 17 so it can be . It needs to equal .

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25