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roys car gets an average gas mileage of 29mi/gal. Roy starts his trip with 12 gal of gas.How many gallons of gas are left after a 140 mile trip?(only an algebraic solution can receive full credit)
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roys car gets an average gas mileage of 29mi/gal. Roy starts his trip with 12 gal of gas.How many gallons of gas are left after a 140 mile trip?(only an algebraic solution can receive full credit)

User Shawrup
by
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2 Answers

3 votes
The answer is 208. The equation to get this is m=29g-140 where m is miles and g is the gallons. Plug 12 in for g and solve for m. 29 * 12 = 348, 348-140 = 208. Therefore, m=208.
User Tim Richard
by
7.1k points
2 votes
You can use a ratio to solve this.

29/1 = 140/x

Cross multiply

29x = 140
x = about 4.8 gallons after the trip
User Sribin
by
6.4k points
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