victor needs to calculate the number of miles per gallon his car averages. his cars gas tank holds 15 gallons og gas. write a formula that will help him determine the average number miles his car gets per gallon ogf gas. x=number of miles traveled a=average number of gallons

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a = miles per gallon = miles / gallon = x / 15 ... if he drives till he runs out of gas  more practically...  a = (miles driven since last fill up) / (gallons to fill up)

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