5^9 · 5^3 =

AH) 5^6
AH) 5^-6
AH) 5^12
AH) 5^3

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?

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

X2 + y 2 = 36 x + y = 6 solve the system of equations.