Do 51×5 and you will get the answer 255
7/3T=N-17
T=3/7(N-17)
T=3/7N -51/7
The answer is A (6 √2) Because your formula ends up being 7^2 + x^2 = 11^2
7^2 + x^2 = 11^2
Becomes
49 + x = 121
So subtract 49 on both sides to get x by itself
x = 72
And Find the square root of x
72 = 6 √2