Need help, not sure if I got the correct answer.

The length of the ladder is 15 feet.

Solution:

Let the length of the ladder be x.

Distance from ground to the top of the ladder = x – 3

Distance from the bottom of the ladder to the building = 9 feet

To find the length of the ladder:

Using Pythagoras theorem,

Subtract from both sides of the equation, we get

Subtract 90 from both sides of the equation.

–6x = –90

Divide by –6 on both sides of the equation.

x = 15

Hence the length of the ladder is 15 feet.

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