Answer:
w = 
Step-by-step explanation:
Using Pythagoras' identity in the right triangle
w² + 7² = 14²
w² + 49 = 196 ( subtract 49 from both sides )
w² = 147 ( take the square root of both sides )
w = 
9/63 = 1/7 = 13/x
13 students jog 91 laps.
Answer is D. I got -6 and -2 in my answer
X=11
Hope this helps your welcome