Suppose y varies directly with x and y=6 when x=-2 find x when y=18

Sara can take no more than 22 pounds of luggage on a trip. her suitcase weighs 112 ounces. how many more pounds can she pack without going over the limit?

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.