Question 1 a) f(x)=2^x and g(x)=3−x i got 3x^2+12 don't know if im right b) i need for this f(x)=sinx and g(x)=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?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Suppose i flip two identical coins. what is the probability that i get one head and one tail?