Use elimination to solve: nn+nd=50
5nn+10nd=450

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r