Which equation correctly describes the relationship between the measures of the angle and arcs formed by the intersecting secant and tangent?

m∠1=1/2(mjk−mkl)
m∠1=1/2(mjk+mkl)
m∠1=1/2mjk
m∠1=mjk−mkl

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?