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Sindrei [870]
3 years ago
13

Substitution for {2x-3y=11 and -x + 2y = -6

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
7 0

Step-by-step explanation:

-x+2y=-6

x-2y=6

x=2y+6

substitute in 2x-3y=11 gives us 2(2y+6)-3y=11

4y+12-3y=11

y=-1

-x+2(-1)=-6

-x=-4

x=4

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Answer:

1 - Option C - 10,000

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Step-by-step explanation:

1) To find : With what number must 3.475817 be multiplied in order to obtain the number 34,758.17?

Solution :

The number 3.475817 is multiplied by number to obtain 34,758.17.

As we see that, the decimal is moved four places to the right.

Which means the number is multiplied by 10000.

i.e. 3.475817\times 10000=34,758.17

Therefore, option C is correct.

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Assuming that x is the same value in each equation,

In order to determine the difference between the two values,

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Answers:

  1. Choice B) y = (1/4)x
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=====================================================

Explanations:

  1. Direct proportional equations are always in the form y = kx, where k is some constant. In the case of choice B, we have k = 1/4. Visually, direct proportion equations are always straight lines and go through the origin.
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