Sally has Christmas lights the roof is 16 feet high the ladder is 20 ft long how far away is letter from wall

1 answer:

4 0

It should be 12 ft away from the wall. Not 4 ft. You do not just subtract the difference because as you pull it away from the wall, the ladder is mostly moving horizontally with only a small vertical change.

You can use Pythagorean Theorem to find the answer. Think of the ladder as the hypotenuse of a right triangle with the wall and the ground as the legs.

a^2 + b^2 = c^2

16^2 + b^2 = 20^2

b^2 = 20^2 - 16^2

b^2 = 144

b = 12 ft

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natta225 [31]

Answer:

The values of k are 2/3 and -1

Step-by-step explanation:

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Given

Consider a= α and b= β

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$(\alpha)^2 + (\beta)^2$ can be written as $(\alpha)^2 + 2(\alpha)(\beta) + (\beta)^2$ if we add $\pm 2 (\alpha)(\beta)$ in the above equation.

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$(\alpha + \beta)^2 -2(\alpha)(\beta)$

Putting values of αβ and α+β

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