MODELING WITH MATHEMATICS A jewelry store sells gold chain by the inch. The table shows the
prices of various lengths of gold chain.
7
9
16
18
Length (inches), I
Price (dollars), p
8.75 11.25 20.00 22.50
a. Explain why p varies directly with l.
b. Write a direct variation equation that relates l
and p.
c. You have $30. What is the longest chain that you
can buy?

Arrange these numbers from least to greatest 3/5 5/7 2/9

What is the value of x when x + 7 = 21?

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books