300 people stay at a resart hotel can go sailing, swimming and play golf .16 people take part in all the three activities, 36 people go sailing and swim, 65 people go sailing only. 22 people do not take part in any of these activities. If the number of people who play golf only is 8 less than those who swim only. Find the number of people who A. Swim only
B. Do not swim​

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?