It’s not 180 help me

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

Is this a polynomial function? i need to know asap

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?