Question

Anyone know I’m having a hard time!

Answer 1

x =
`√(30)`

Explanation:

Applying altitude- on - hypotenuse theorem.

(leg of large Δ )² = ( part of hypotenuse below it ) × ( whole hypotenuse )

x² = 3 × (3 + 7) = 3 × 10 = 30 ( take square root of both sides )

x =
`√(30)`