Question

A Web music store offers two versions of a popular song. The size of the standard version is 2.4 megabytes (MB). The size of the high-quality version is 4.8 MB

Yesterday, there were 610 downloads of the song, for a total download size of 2400 MB. How many downloads of the high-quality version were there?
10

Answer 1

390

Explanation:

We can set up the question as a system of equations:

`x=` Standard Version

`y=\\` High-quality Version

System of equations:

`2.4x+4.8y=2400\\x+y=610`

Now, we solve for y:

`2.4x+4.8y=2400-- > x+2y=1000\\x+2y=1000\\x+y=610\\\fbox{y=390}`