Ruben is collecting cans for the recycling contest at school. he makes two plans to try to collect the most cans. plan a: collect 20 cans each week for 9 weeks. plan b: collect 30 cans each week for 7 weekspart awhich plan should ruben choose? part bexplain how you made your choice

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18