What is the numerical factor of a multiplication expression like 3x

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?

3x + 4y = 5 x- 3y = -7 solve by substitution

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?