Question 740619
Andrew buys books and videos in a store. He uses the expression 6b+12v to find the cost of what he is buying,where b is the number of books and v is the number of videos he buys. 
Use the expression to find the total cost of 4 books and 5 videos.
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Cost = 6*4+12*5 = 24+60 = $84.00
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Cheers,
Stan
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