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3 years ago

12

A totem pole casts a 20 meter shadow when the angle of elevation of the sum is 45what is the distance from the top of the totem

pole to the end of the shadow

1 answer:

abruzzese [7]3 years ago

8 0

Answer:

20√2 meters (approximately 28.28 m)

Step-by-step explanation:

It may help to make a diagram. Because this is a 45 45 90 triangle, you can use those rules to help solve.

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Simplify the radical expression (-9√28a^2*1/3√63a)<br><br> show work

Dovator [93]

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$-\not9^3\sqrt{28a^2}*\frac{1}{\not3^1}\sqrt{63a}=\\\\ =-3a\sqrt{4*7}*\sqrt{9*7a}=\\\\=-3a*2\sqrt{7}*3\sqrt{7a}\\\\ =-18a\sqrt7*\sqrt 7*\sqrt a=\\\\=-18a*(\sqrt7)^2*\sqrt a =\\\\ =-18a*7*\sqrt a=\\\\ =-126a\sqrt a$

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3 years ago

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3 years ago

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2. A doctor created a scatterplot to show the relationship of heart rate to

Fed [463]

Answer:

Step-by-step explanation:

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3 years ago

The diagonal of a rectangle is 25 inch. the width is 15 in. what is the area of the rectangle?

givi [52]

D= diagonal= 25 in
w= 15 in

A= w√(d^2﹣w^2)

A= (15)√(25^2 - 15^2)
square in parentheses

A= (15)√(625 - 225)
subtract in parentheses

A= (15)√(400)
take square root of 400

A= (15)(20)

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ANSWER: The area is 300 inches squared

Hope this helps! :)

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3 years ago

If f(x) = 5x − 3, which expression represents its inverse function?

Drupady [299]

Answer:

B.

$\frac{x+3}{5}$

Step-by-step explanation:

5x - 3 = y then 5x = y + 3 then x = (y + 3)/5

then the inverse function of f is : (x+3)/5

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3 years ago