Can anyone explain how to do this ACT math question? Three years ago, men made up two out of every three internet users in America. Today the ratio of male to female users is about 1 to 1. In that time the number of American females using the internet has grown by 30,000,000, while the number of males who use the internet has grown by 100%. By how much has the total internet-user population increased in America in the past three years? a. 50,000,000
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Sam_PrepScholar |

Then, we can use different variables to represent the current number of male and female users. So the two equations we have now are:
Now, lets relate the variables in the first equation to the variables in the second equation based on the question. Our two additional equations are:
Remember now that question is asking how much the total internet-user population grew. We know that y1 = y + 30,000,000. From the second equation, y1 = x1, so we can also say that From the fourth equation, x1 = 2x, which means we can replace x1 with 2x. That gives us 2x = y + 30,000,000 or Now Simplifying this expression, Adding on the increase of 30 million female internet users, we can conclude that
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Sam_PrepScholar |

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