The sum of two numbers is 21 the second number is six times the first number. work out the two numbers

Which of the following points is collinear with (-2,1) and (0,3)

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

How do you solving the solution of each system using elimination?