1. **Problem 16:** Solve for $x$ in the right triangle with given sides 8 and 15. 2. The problem likely involves the Pythagorean theorem: $$a^2 + b^2 = c^2$$ where $c$ is the hypotenuse. 3. Given sides 8 and 15, assume these are legs, so: $$x^2 = 8^2 + 15^2$$ 4. Calculate squares: $$x^2 = 64 + 225 = 289$$ 5. Take the square root: $$x = \sqrt{289} = 17$$ 6. Therefore, the value of $x$ is 17. **Final answer:** $x = 17$