Question

Find the value of x to the nearest tenth.

a. 9.9


b. 10.5


c. 8.9


d. 10.1

Answer 1

a² + b² = c²
15² + x² = 18²
x² = 18² - 15²
x² = 99
x = √99
x = 9.9 units (nearest tenth)

Answer: x = 9.9 (Answer a)

Answer 2

Option A is your answer, 9.9

x² + 15² = 18²
x² + 225 = 324
x² = 99
x = √99
x = 3√11

x ≈ 9.9499 or to the nearest tenth x ≈ 9.9