PLS ANSWER WILL GIVE BRAINLIEST

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

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?