Consider the following system of equations:
equation 1: 82 + 2y = 30
equation 2: 70 + 2y = 24
which variable pair should we try to eliminate?
the x's because the coefficients are the same.
the y's because the coefficients are the same.
the x's because the coefficients are different?
the y's because the coefficients are different?

(hurry! ) which expression is equivalent to the following complex fraction?

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.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?