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nataly862011 [7]
3 years ago
10

The first equation in the system of equations that models this situation is x+y=70, where x represents the number of 2-point que

stions the number of 4-point questions. What is the other equation in the system? Enter the correct answer in the box. Substitute numerical values in the expression for A, B, and C.
Mathematics
1 answer:
tankabanditka [31]3 years ago
8 0

Answer:

2x+4y=150

Step-by-step explanation:

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I think it’s D

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Which of the following tables does not represent a linear relationship between x and y?
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The first one is not liner

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Pilar says that two linear systems below have the same solution. (see picture) Is she correct? Explain.
wariber [46]
The first set:

3x + 2y = 2  ---1)
5x + 4y = 6  ---2)

From 1), multiply all by 2, 6x + 4y = 4  ---3)

3) - 2),

6x + 4y - (5x + 4y) = 6 - 4
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Sub in x = 2 into 1),

3(2) + 2y = 2
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The second set:

3x + 2y = 2  ---1)
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From 1), multiply all by 4, 12x + 8y = 8 ---3)

3) - 2),

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12x + 8y - 11x - 8y = -2
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From this x value alone, we can tell that these two linear systems do NOT have the same solution as they meet at different coordinates.

Hope this helped! Ask me if there's any working from here that you don't understand! :)

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