Answer:
Explanation:
This is the given system of equations:

A linear combination of the system is any equation formed by the algebraic addition of both equations, one or both multiplied by an arbitrary constant.
To prove that the given system has no solution you could multiply the first equation times 6 (to get rid of the fractions), multiply the second equation times - 1, and add the two results:
<u>1. First equation times 6:</u>

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<u>2. Second equation times - 1:</u>

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<u>3. Add the two new equations:</u>

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<u>4. Conclusion:</u>
Since 0 = 78 is false, no matter what the value of x and y are, the conclusion is that the system of equations has not solution.
The only choice that represents that same situation is the second one, 0 = 26. That is a possible linear combination that represents that the system of equations has no solutions.
In fact, you might calculate the exact factors by which you had to multiply each one of the original equations to get 0 = 26, but it is not necessary to tell that that option represents a possible linear combination for the given system of equations.
Answer:
<u>There are 270 longs</u>
Step-by-step explanation:
<u>Equations</u>
We must write the problem into a mathematical model that allows us to apply the properties of basic algebra and solve for the variable which must be adequately set up.
We have three unknowns: the number of long blocks, flats blocks, and cubes. The conditions are given:
- There are three times as many longs as cubes
- There are 30 fewer flats than longs.
- There are 600 blocks in all
For the equation to be easier solved, let's set the variable as the number of cubes:
x = number of cubes
Considering the first condition, we have
3x = number of longs
3x-30 = number of flats
And finally:

Joining like terms:

Solving for x

Therefore, there are 3x = 3*(90) = 270 longs
Answer: there are 270 longs
Answer:
E
600
Step-by-step explanation:
10n - 1000 = 5000
10n = 6000
n = 600
HOPE THIS HELPS
PLZZ MARK BRAINLIEST
Answer:
124 tiles
Step-by-step explanation:
2(20+40)
2(60)
120+4=124