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zubka84 [21]
4 years ago
7

You can fill a 12-gallon tank of gas for $48.74 or buy gas for $3.80/gallon (round to the nearest cent as needed

Mathematics
1 answer:
frozen [14]4 years ago
8 0
Fill 12 gallon tank for $48.74.
or buy gas for $3.80 a gallon.

$3.80 x 12= $45.60.

buying gas is cheaper by $3.14.
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Given:

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Divide by 180° on both sides.

$\frac{S}{180^{\circ}}=\frac{(n-2) \times 180^{\circ}}{180^{\circ}}

Cancel common factor 180°.

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Add 2 on both sides.

$\frac{S}{180^{\circ}}+2=n-2+2

$\frac{S}{180^{\circ}}+2=n

Switch the sides.

$n=\frac{sum}{180^{\circ}}+2

Therefore number of sides of a polygon is n=\frac{sum}{180^{\circ}}+2.

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