Question

5. What is the value of x to the nearest tenth?
12

Answer 1

B

Explanation:

Since the triangle is right use Pythagoras' identity to solve for x

The square on the hypotenuse is equal to the sum of the squares on the other two sides, that is

x² + 7² = 12², that is

x² + 49 = 144 ( subtract 49 from both sides )

x² = 95 ( take the square root of both sides )

x =
`√(95)` ≈ 9.7 ( to the nearest tenth )