Answer:
x=12
Step-by-step explanation:
We can use the Pythagorean Theorem for this problem.
A^2+B^2=C^2
The A or B can represent 9, but C must represent the 15 because it is the hypotenuse. Inputing these into the equation gives this:
9^2+B^2=15^2 (I just represented A as 9)
Solving further gives this:
81+B^2=225
Solving for B gives the answer 12.
So x must be 12.
Boom.
