Work out 3 4/5 + 3/7 give your answer as a mixed number in its simplest form

Which of these choices show a pair of equivalent expressions?

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?