2. solve for the number.
a. 75 is 20 percent of what number?

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?

Find the difference (8ab+a+2) - (3ab+6)

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.