A man's regular pay is $3 per hour up to 40 hours. Overtime is twice the payment for regular time. If he was paid $216, how many hours of overtime did he work? 

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?