Help please! This is due today and i totally forgot A

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Three times the sum of a number and seven is negative thirty-six. what is the number?

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?