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In Mathematics / Middle School | 2014-04-02

How many minutes is it before 12 noon if 20 minutes ago it was three times as many minutes after 9 a.m.?

Asked by seeran

Answer (2)

First, change everything into minutes. 12 noon is 12 by 60 which = 720 minutes. 9am is 9 by 12 which = 540 minutes. X is now your number of minutes before noon.So noon - x is the next step: 720 - x 20 minutes ago it was 720 - x - 20 720 - x - 20= 540 + 3x (3x because you're looking for 3 times as many minutes) 720 - 20 - 540=4x (you combine all the like numbers and variables) 160 = 4x 160/4= x 40 = x Your answer is 40 minutes

Answered by Pip | 2024-06-10

The time before 12 noon is 40 minutes. This conclusion is reached by setting up an equation based on the relationship described in the problem. Therefore, it is 40 minutes before noon.
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Answered by Pip | 2024-12-23

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