Which of the following number is 90
Divisible by? 2,3,4,5,6,9,10

What is the simplified expression for 6(2(y+x))

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 value of x for which line a is parallel to line b