Alg 1
posted by Emma on .
You have 60 megabytes of space left on your portaable media player. You can choose to download song files that use 3.5 megabytes or video files that use 8 megabytes. You want to download at least 12 files. What is a graph showing the numbers of songs and video files you can download?

x + y >= 12 files
3.5x + 8y <= 60 MB
> 3.5x + 8 (12x) <= 60
3.5x  8x + 96 <= 60
96  60 <= 4.5x
=> x = 36/4.5 = 8 songs
Thus y = 12  8 = 4 videos