if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:
6 purchases
if you are asking how many of each then:
18 social media ads
6 newspaper ads
Answer from: Quest
twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2
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