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Rudik [331]
3 years ago
8

Sorry hii im dum so can someone explain this for me im so lost

Mathematics
2 answers:
sveticcg [70]3 years ago
8 0

im in highschool and i have no idea

Step-by-step explanation:

KiRa [710]3 years ago
7 0
Im in middle school and i havent learned this yet sorryyyy
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The system of equations below has no solution.
mixer [17]

Answer:

  • Second option: 0 = 26

Explanation:

This is the given system of equations:

\frac{2}{3} x+\frac{5}{2} y=15\\ \\ 4x+15y=12

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>

6\times\frac{2}{3} x+6\times\frac{5}{2}y=6\times 15\\ \\ 4x+15y=90

<u />

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

-4x-15y=-12

<u />

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

0=78

<u />

<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.

7 0
3 years ago
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Find the surface area of the regular pyramid.<br> 9 ft<br> 6 ft<br> Plsss help asap
olganol [36]

Answer:144

Step-by-step explanation: I explained what to do in the comments.

4 0
3 years ago
If we reject the null hypothesis, does this mean that we have proved it to be false beyond all doubt? Explain your answer.a. Yes
crimeas [40]

Answer:

Yes, the test was conducted with a risk of a type I error.

Step-by-step explanation:

If we reject the null hypothesis, does this mean that we have proved it to be false beyond all doubt? Explain your answer.

Yes, for a null hypothesis to be rejected, it has being proven beyond all doubt that the null hypothesis will not work. the normal distribution has being used for the probability calculation.

if the null hypothesis is rejected and the alternative hypothesis is accepted, a type I error as occur.

In general terms:

‘a hypothesis has been rejected when it should have been accepted’. When this occurs, it is called a type I error.

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3 years ago
What is the area of this quadrilateral please help FAST!!!
kvasek [131]

C, 80 square feet.

Have a nice day!

8 0
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Marguerite is selling space in an advertising book for a community fund raising event. Each 1/4 page in the book costs $15.50. W
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It would be 46.50 dollars
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