We will use the Pythagorean theorem to determine the height:
Finally: 
Answer Ladder will reach the height of 14.59 feet ( to the nearest hundredths).
Answer Ladder will reach the height of 14.59 feet ( to the nearest hundredths).
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2 answers:
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For this case what you must do is to graph both lines. (See attached graph) and see where both are cut.
We note that both lines are cut at the point (2,5)
Therefore the solution for f (x) = g (x) is x = 2
answer
x = 2
We note that both lines are cut at the point (2,5)
Therefore the solution for f (x) = g (x) is x = 2
answer
x = 2