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elixir [45]
3 years ago
13

A number is k units to the left of 0 on the number line . Describe the location of its opposite

Mathematics
1 answer:
shusha [124]3 years ago
8 0
The opposite of left is right, so the number opposite k is k units to the right.
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Alexa pays 7/20 of a dollar for each minute she uses her pay-as-you-go phone for a call, and 2/5 of a dollar for each minute of
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Answer:

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Step-by-step explanation:

It is always a good idea to start by defining variables in such a problem. Here, we can let x represent the number of calling minutes, and y represent the number of data minutes. The the total number of minutes used is ...

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The total of charges is the sum of the products of charge per minute and minutes used:

  7/20x + 2/5y = 31.00

We can eliminate the x-variable in these equations by multiplying the first by -7 and the second by 20, then adding the result.

  -7(x +y) +20(7/20x +2/5y) = -7(85) +20(31)

  -7x -7y +7x +8y = -595 +620 . . . . eliminate parentheses

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Then the value of x is

  x = 85 -y = 85 -25

  x = 60

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Step-by-step explanation:

Let x represent money spent on monthly bills.

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