Need help with a system of equations

Christine went shopping and bought each of her six six nephews a? gift, either a video costing? $14.95 or a cd costing? $16.88. she spent ? $ 97.42 97.42 on the gifts. how many videos and how many cds did she? buy?

What is the square root of 45? (step by step working plz)

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?