Every package of a certain toy also includes 2 batteries. Are the number of toys and number of batteries in a proportional relationship?

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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

9is the geometric mean between x and 12