Answer the ones that are not answered just answer all

What is the least common multiple of 6 and 17?

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

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?