HELP PLS!! answer quickly

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?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Which value is not a solution of 8x^3 – 1 = 0