Today, 7 friends went out for lunch. Their total bill was $39.90 , including tax and gratuity. They decided to split the bill equally and each paid with a $10 bill. How much money will each person get back?

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.

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.