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kobusy [5.1K]
3 years ago
7

Tell whether the ordered pair (-4,-2) is a solution of the system of linear equations.

Mathematics
1 answer:
Andreyy893 years ago
5 0
The ordered pair (-4,-2) is a solution for both of the equations
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The mean of 10 values is 19. If further 5 values are
Leokris [45]

Answer:

22

Step-by-step explanation:

Pretend the 10 values in the first sentence are a,b,c,d,e,f,g,h,i,j

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So the mean of all the 15 data is (a+b+c+d+e+f+g+h+i+j+k+l+m+n+o)/15=20

So the sum of all 15 data is  a+b+c+d+e+f+g+h+i+j+k+l+m+n+o=300                since 15(20)=300

Now let's look at the first 10:  We have their mean so we can write:

(a+b+c+d+e+f+g+h+i+j)/10=19

so a+b+c+d+e+f+g+h+i+j=190                               since 10(19)=190

So that means using our first sum equation and our equation sum equation we have

190+k+l+m+n+o=300

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      k+l+m+n+o= 110

So the average of those 5 numbers mentioned in your problem is 110/5=22

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Answer:

Step-by-step explanation:

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