SOLUTION: A new automobile engine can run on a mixture of gasoline and a substitute fuel. If gas costs $1.50 per gallon and the substitute fuel costs 40 cents per gallon, what percent of a m
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Question 104221This question is from textbook College Algebra
: A new automobile engine can run on a mixture of gasoline and a substitute fuel. If gas costs $1.50 per gallon and the substitute fuel costs 40 cents per gallon, what percent of a mixture must be substitute fuel to bring the cost down to $1 per gallon?
This question is from textbook College Algebra
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
let x=(gallons of substitute); so %=x/(1+x)
150(1)+40(x)=100(1+x)
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