A car traveled 35 miles in 2 hours. At this rate, how many miles will the car travel in ½ hour?

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Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *