For simplifying what’s 1.(x + 2)(x +7)
2.(m - 5)(m - 2)
3.(2x+3)(x+1)
4.(5x +3)(x - 2)
5.(4m + 1)^2
6.(y - 8)(y + 8)
7.(x + 5)(x^2 + 4x -8)
8.(4x-1)(x^2 - 7x +1)
9.(3x + 2)(5x^2 - 12x - 2)

How many revolutions will a car wheel of diameter 28 in. make over a period of half an hour if the car is traveling at 60 mi/hr? the final answer is supposedly 21,609 but i have no idea how to get that, show work : )