The old duplicator could produce an issue
of the newsletter in 2 hours. The new one
takes 40 minutes. How long will it take it
both machines are used?

How do i do this activity, is appreciated

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

With number 11 ( show how you got the answer)