Find the missing number : 7 = 12: 21

a.14
b.12
c.4
d.3

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

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?