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a rental car agency charges a flat rate of $139 plus $30 per day to rent a certain car. another agency charges a fee of $13 plus $51 per day to rent...
a rental car agency charges a flat rate of $139 plus $30 per day to rent a certain car. another agency charges a fee of $13 plus $51 per day to rent the same car. using a graphing calculator, find the number of days which the cost is the same. round to the nearest whole day