If a hot air balloon rises 1,400 feet in 35 minutes how many feet, on average, does it rise per minute?

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Can any one me with the answers to these questions asap?