Solve 4x-y=-5 -2x+3y=10

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

The monetary value earned for selling goods or services to customers is called a.) revenue b.) assets c.) money d.) accounting