A shop sells erasers at $1 each and in packets of 6 at 1 packet for $4. Edmund wants to buy 38 erasers. What is the least amount of money that Edmund will need?

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

What is the slope of the line that contains the points (-2,1) and (0,-3)

What is the value of f(x) = 2.2 for f(-2)?