Standard form, expand form what is the other form

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have

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?

Measure a and b and find their sum. how are the angles related?