Hello! I need your help with something real quick! ^^

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?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Ineed with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x