Simplify the expression

6:3x4

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If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same