Solve using a matrix. show all work by hand.
x-5y=-5
-4x-2y=20

The ratio of two numbers is 5 to 4. the sum of the numbers is 99. what number is the greater of the two numbers?

1: 4 if the wew 35 surfboards at the beach how many were short boards?

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?