Select the expression that is equivalent to the expression: *distribute then combine like terms

Select the expression that is equivalent to the expression:

*distribute then combine like terms
1/2(9x + 12) + 5x +9
8x + 13
8x + 21
28x
14x + 21

Acircular hot tub located near the middle of a rectangular patio has a diameter of 48 inches. the patio measures 11 feet by 6 feet. what is the area of the patio that is not covered by the hot tub?

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.