A family wants to rent a car to go on vacation. Company A charges ​$70.50 and 18¢ per mile. Company B charges ​$30.50 and 8¢ per mile. How much more does Company A charge for x miles than Company B​? For x​ miles, Company A charges nothing dollars more than Company B

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B. A rectangular garden has a walkway a round it. The area of the garden is 4​(3.5x+2.5​). The combined area of the garden and the walkway is 4.5​(6x+6​). Find the area of the walkway around the garden as the sum of two terms.
The area of the walkway around the garden is nothing.
​(Simplify your answer