The size of airmail packages is it continuous or discrete?

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?