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03-12-2018
Mathematics

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How far from the base of the house do you need to place a 15-foot ladder so that it exactly reaches the top of a 12-foot tall wall?

How far from the base of the house do you need to place a 15foot ladder so that it exactly reaches the top of a 12foot tall wall class=

Respuesta :

03-12-2018

Answer:

9 Feet

Step-by-step explanation:

12^2 + x^2 = 15^2 ⇒ x^2 = 15^2 − 12^2 = 81 ⇒ x = √ 81 = 9 ft

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