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Mandarinka [93]
3 years ago
13

Explain what their first step would be if they wanted to eliminate the y variable from the equations.

Mathematics
1 answer:
Vinvika [58]3 years ago
5 0

Answer:

  • r1 +4×r3 ⇒ r1
  • r2 -3×r3 ⇒ r2

Step-by-step explanation:

We note that the coefficient of y in equation (iii) is 1, so it is convenient to use that equation to eliminate y from the others.

__

<em>To eliminate the y-variable from equation (i), four times equation (iii) can be added to equation (i).</em>

<em>To eliminate the y-variable from equation (ii), three times equation (iii) can be subtracted from equation (i).</em>

_____

The result of these operations would be ...

  10x +6z = 28\quad\text{(iv)}\\\\-7x-9z=2\quad\text{(v)}

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Answer:

1

Step-by-step explanation:

Numbers to the "right of 0" implies the positive numbers.  And an integer has no fractional component.  Thus, the first integer to the right of 0 would be 1.

Cheers.

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For an employee training, the employee to instructor ratio is 12 to 2. If there are 39
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Answer:

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Step-by-step explanation:

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Hope this helps!

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If I got 15 credits in i need 24 to graduate how many more i need
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Step-by-step explanation:

I would have 9 to graduate

8 0
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A certain mixture of paint contains 5 parts white paint for every 4 parts blue paint. If a can of paint contains 75 ounces of wh
valentinak56 [21]

Answer:

60 ounces.

Step-by-step explanation:

Given:

A mixture contains 5 parts of white paint for every 4 parts of blue paint.

i.e. Ratio of white paint : blue paint = 5 : 4

Quantity of White paint = 75 ounces

To find:

How many ounces of blue paint = ?

Solution:

Here, we are given the ratio of white and blue paint in the mixture.

Also, we are given the quantity of white paint in the paint can.

And we have to find the quantity of other paint in the can.

Let us use all the given statements to find the unknown quantity of blue paint.

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So, the quantity of blue paint in the can is 60 ounces.

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