B because you multiplies both top and bottom by 3 C because when simplifying the numerator, you get 2a+2b and when simplifying the denominator you get 2a-2b. If you divide both top and bottom by 2, you would get the original ratio. That's it. A is wrong because it flipped the top and bottom, D is wrong because it does the same thing as A after being simplified, and E is wrong because 1/3 is not equal to 0.3.
3 shirts + 2 pants. adding the cost of the shirts and the cost of the pants. so 3 * how much the shirts cost + 2 * how much the pants cost give you your total.
