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solong [7]
3 years ago
8

Can i please get some help asap

Mathematics
1 answer:
eimsori [14]3 years ago
8 0
If my math is right it should be b
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Choose the equation that is equivalent to this statement. 9090 is 70% of x.
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Why can a problem with extra information be difficult to solve?
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A problem with extra information will be difficult to solve because you may not be able to tell what information you might need to use for the problem.

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svet-max [94.6K]

Answer:

The polygon has 9 sides

Step-by-step explanation:

we know that

A regular polygon has equal length sides and equal interior angles

step 1

Find the measure of the interior angle

Remember that

The interior angle plus the exterior angle must be equal to 180 degrees (form a linear pair)

Let

x ----> the measure of each interior angle in the regular polygon

so

x+40^o=180^o

solve for x

x=180^o-40^o=140^o

step 2

Find the number of sides of the regular polygon

we know that

The measure of each interior angle in a regular polygon is given by the formula

x=\frac{(n-2)180^o}{n}

where

n is the number of sides of the polygon

substitute the given values

140^o=\frac{(n-2)180^o}{n}

solve for n

140n=180n-360\\180n-140n=360\\40n=360\\n=9\ sides

therefore

The polygon has 9 sides

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3 years ago
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