Tyrone bought 15.3 gal of gasoline priced at g dollars per gal, 2 qt of oil priced at q dollars per qt, and a wiper blade priced at 3.79. How do you write an expression that represents the total cost of these items?

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Answer 1 · 2016-11-28T07:28:30

C (in dollars) = #15.3g + 2q + 3.79#

Use C to represent the total cost and g and q are the unknown values of the gas and oil, and all unknowns and the wiper blades are in dollars.

Then we can add up the components to express the total cost.

#15.3# gallons of gasoline @ #"$g per gallon "# cost = #15.3xxg#
#2# quarts oil @ #"$q per quart"# cost = #2q#

#C = 15.3g + 2q + 3.79#