Chapter 2 - Solving Equations - 2-7 Solving Proportions - Practice and Problem-Solving Exercises - Page 128: 40

x = 40 min

Step 1) (15/45) = (x/120) Step 2) 1800 = 45x Step 3) 1800/45 = x Step 4) x = 40 --- To find how long it will take to download a 120-minute movie on this computer at a rate of 14 minutes download time per 45 minutes of a show, set up a proportion. Let x equal the number of minutes. Cross-multiply to solve.