Question

Help me please. I don’t understand at all. I’m stressing. Like what?!?!?!

Answer 1

z =
`√(117)`

Explanation:

find 'y' first by using the altitude rule:

y/4 = 9/y

cross-multiply:

y² = 4(9)

y² = 36

y =
`√(36)` = 6

Find 'z' by using the Pythagorean Theorem with legs equal to 6 and 9

6² + 9² = z²

36 + 81 = z²

117 = z²

z =
`√(117)`