Mel fills his gas tank with 6 gallons of gas. It cost Mel $21.15. How much would it cost Mel to get 18 gallons of gas?
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$63.54

Step-by-step explanation:

You first need to find how much it costs for one gallon of gas. To do this, you divide the amount of money by the amount of gallons;

$21.15 / 6 gallons = $3.53

For one gallon of gas, it costs $3.53. To find how much 18 gallons would cost, we multiply how much gas/gal costs by 18 gallons.

$3.53 x 18 gallons = $68.54 for 18 gallons of gas

I hope this helps!

0.5?

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