How many four-digit numbers can be formed from the numbers 1,3,4,6,8 and 9 if repetition of digits is not allowed ?

Which point is on the line y=-2+3? (-2,-1) (3,3) (3,-3) (-3,-9)

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?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /