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Sergio [31]
3 years ago
9

(-6)^-1 multiply by x = 27^-1. find x

Mathematics
1 answer:
iren [92.7K]3 years ago
8 0
I’m guessing the question is written as (-6)^-1x=27^-1

to get rid of a negative exponent, you use the reciprocal of the number.

so (-6)^-1 would be 1/-6
27^-1 would be 1/27

rewrite is as

(1/-6)x = 1/27

multiply both sides by reciprocal or 1/-6 to cancel it and make x by itself

it’s would be x = 1/27(-6)

multiply

x = -6/27

simplify

the final answer is x=-2/9
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3 years ago
A wooden plank is leaning against a wall. The bottom of the plank is 3 feet from the wall. Answer each of the following question
Nadusha1986 [10]

AB = ==> distance between the bottom of the plank; and the wall ===> 3 ft.

C ====> 49 degrees

For letter a, to solve for AC:

AC ==> HYPOTENUSE. The angle C is the OPPOSITE side of AB.

use sine :

sin A ===> opposite/hypotenuse

Solve:

sin 49 ====> 3/AC

AC ====> 3 / sin 49

AC ====> 3.96 ft.

For letter b, to solve for BC:

We are now given with the base (3 ft.); and; the hypotenuse (3.96 ft.) so we can use the Pythagorean theorem:

a^2 + b^2 = c^2

Let:

a ===> AB

b ===> BC

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Hope that helps!!!! : )

3 0
3 years ago
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