Chapter 1.1, Problem 5QR

The equation P = 4.5b − 490.5 represents the profit in dollars from selling b books.   1-Find the profit if you sell 75 books. (Include units in your answer.)   2-Find the profit if you sell 200 books. (Include units in your answer.)

Use a table. Evaluate 2x=2 for x=-2,-1,0,1,2 and 3. What pattern do you notice in your results? Use this pattern to find the solution of 2x+2=28. Check your solution.

1. (Beginning/Developing) The profit gained from selling x video games can be modeled by the equation P = x² – 20x+ 100. a. How many videos do you need to sell in order to break even? b. If you would like to make $1000 in profit, how many video games do you need to sell?