Question

Numbers 8, 12, 18, 20

8. Find the equation of the line perpendicular to 3x - 4y 12 and passing through (6,1). 9. The annual revenue of a new web-services company in dollars is given by R(n)- 125n, where n represents the number of users the company has registered. The annual maintenance cost of the company's registered user base in dollars is given by the formula C(n) 85n+22, 480 where n represents the users. a. Write a function that models the annual profit based on the number of registered users. b. Determine the number of registered users needed to break even. 10. A particular search engine assigns a ranking to a webpage based on the number of links that direct users to the webpage. If no links are found, the webpage is assigned a ranking of 1. If 40 links are found directing users to the webpage, the search engine assigns a page ranking of 5. a. Find a linear function that gives the webpage ranking based on the number of links that direct users to it. b. How many links will be needed to obtain a page ranking of 7? Use the transformations to sketch the graph of the following functions and state the domain and range. 11. g(x) lx +41-5 13. x)(x + 3)

Answer 1

312 3 3