A family cell-phone plan is sold for $35 a month for the first line and $20 for each additional line. a. write a recursive formula for the monthly cost of the plan for n users

b. write a explicit formula for the monthly cost of the plan for n users​

Which shows the pre image of triangle xyz

Write the following as a base and exponent

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.