Is this sequence arithmetic? If so, what is the common difference (d)? 12, 19, 26, 33

Determine the volume of a cylinder bucket if the diameter is 8.5 in. and the height is 11.5 in.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?