If a ÷ b = 2 and b ÷ c =3/4, what is the value of c ÷ a? Express your answer as a common fraction.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it.find the area of the sidewalk.

Solve 17= -13 - 8x and show your work.