Answer:
x ≈ 6.6
Step-by-step explanation:
Use Pythagoras' identity in the right triangle.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
x² + ([tex]\sqrt{5}[/tex] )² = 7²
x² + 5 = 49 ( subtract 5 from both sides )
x² = 44 ( take the square root of both sides )
x = [tex]\sqrt{44}[/tex] ≈ 6.6 ( to the nearest tenth )
