How many terms are in this expression? 2s²+u²

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

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 angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles