Help again i hate math

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

Oliver read for 450 minutes this month his goal was to read for 10% more minutes next month if all of her medicine go how many minutes will you read all during the next two months

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?