30 = 6y

A)y= 5

B)y = 6

C)y = 180

D)y = 10

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?

Find the rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.