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wariber [46]
4 years ago
5

Espa

Mathematics
1 answer:
MatroZZZ [7]4 years ago
8 0

Answer:

  • 30 mpg
  • 15 mpg

Step-by-step explanation:

Let x represent the fuel efficiency of one of the cars. Then 45-x is the fuel efficiency of the other. The total miles driven is then ...

  miles = (gallons)×(miles/gallon)

  20x +30(45-x) = 1050

  -10x +1350 = 1050 . . . simplify

  300 = 10x . . . . . . . . . . add 10x-1050

  x = 30 . . . . . . . . . . . . . divide by 10

  45-x = 45-30 = 15

The car using 20 gallons got 30 miles per gallon; the car using 30 gallons got 15 miles per gallon.

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