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Math for College Readiness 1

A Web music store offers two versions of a popular song. The size of the standard version is
2.1
megabytes (MB). The size of the high-quality version is
4.4
MB. Yesterday, the high-quality version was downloaded three times as often as the standard version. The total size downloaded for the two versions was
3825
MB. How many downloads of the standard version were there?

Respuesta :

znk

Answer:  

250

Explanation:  

Let's call the number of standard downloads S and the number of high-quality downloads H.  

For number of downloads:  

(1) H = 3S  

For downloaded size:  

(2) 4.4H + 2.1S = 3825     Substitute H in Equation (2)  

4.4 × 3S + 2.1S = 3285  

    13.2S +2.1S = 3825     Combine like terms  

              15.3S = 3825  

                    S = 250

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