A shade of paint is made by evenly mixing m gallons of white paint, costing $12 a gallon, with n gallons of blue paint, costing $30. What is the cost, in dollars per gallon, of the resulting mixture?
12m +30n
42(12m +30n)
(12m +30n) / 42
(12m +30n) / (M+ N)
42(M+ N) / (12m +30n)
please explain your logic.
12m +30n
42(12m +30n)
(12m +30n) / 42
(12m +30n) / (M+ N)
42(M+ N) / (12m +30n)
please explain your logic.
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