Problema Solution
Randy has a 31 mi. roundtrip drive to and from work every day. How much does he spend on gasoline in a 5-day week if gasoline is $1.32 a gallon and he gets 31 km. per gallon?
Answer provided by our tutors
For in 1 day Randy drives 31 mi in 5 days he will drive 5 time that distance or 5*31 = 155 mi.
1 mi = 1.60934 km
155 mi = 155*1.60934 km
155 mi = 249.45 km
Let 'x' represent the gallons he spends.
31x = 249.45
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click here to see the equation solved for x
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x = 8.05 gal
One gallon is $1.31, 8.05 will be 8.05 times that amount:
$1.31*8.05 = $10.5455
He spends $10.55 on gasoline per 5-day week.