Can you help please? I have English problems and I try to make an effort and not fall into school !!:(

1. what is the measure of ∠abc? what is the measure of ∠abd?

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?

Extra points! find the missing dimension! need asap