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timurjin [86]
2 years ago
15

What are the slope and one point on the graph of y-4/9(x+7)

Mathematics
1 answer:
Pavlova-9 [17]2 years ago
5 0
Not linear.

Do you want the graph? 

I'm confused...
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A data set of 27 different numbers has a mean of 33 and a median of 33. A new data set is
Svetllana [295]

Answer:

Option D.

Step-by-step explanation:

Suppose that we have a set of N values:

{x₁, x₂, ..., xₙ}

The median is the value in the middle, and the mean is calculated as:

M = \frac{(x_1 + x_2 + x_3 ... + x_n)}{N}

Because here we have "the median" then we will assume that N is odd, and there is only one median, the value "k"  (if N was even, the median would be the mean of the two middle values, that case is really similar to the case where N is odd, so solving only one of the cases is enough)

Now we add 7 to all the values greater than the median

We subtract 7 to all values smaller than the median.

Then the median remains unchanged (because we did not add nor subtract anything to the median).

The new mean will be:

M' = \frac{(x_1 - 7) + (x_2 - 7) + ... + (x_{k}) + ... + (x_n + 7)}{N} = \frac{(x_1 + x_2 + ... + x_n) + (-7)*(n/2 - 0.5) + 7*(n/2 - 0.5)}{N}  = \frac{(x_1 + x_2 + ... + x_n)}{N} = M

So the mean does not change.

Because the mean is computed as the sum of the numbers divided by N, and the mean does not change, and N does not change, then the sum of the numbers does not change.

Finally, the standard deviation is computed as:

SD = \sqrt{\frac{(x_1 - M)^2 + ... + (xn - M)^2}{N} }

Because M does not change, if we add or subtract numbers to some of the values, the standard deviation will change (Because all the terms are squared, so the added and subtracted sevens don't cancel like in the previous cases)

Then the only value that does not have the same value in both the original and new data sets is the standard deviation.

6 0
2 years ago
Which ordered pair is not a solution of y = 2x + 1?
Dmitrij [34]

Answer:

(-1,1)

Step-by-step explanation:

All you have to do is plug it in the equation:

      (x,y)

For (-1,1)

1=2(-1)+1

Simplify:

1=-1 but you know that 1≠-1 so (-1,1) is not it

For (3,7)

7=2(3)+1

Simplify:

7=7

For (-3,-5)

-5=2(-3)+1

-5=-5

Simplify:

For (0,1)

1=2(0)+1

1=1

7 0
3 years ago
Read 2 more answers
Please Quickly
Dima020 [189]
X=1.5 let me know if u need an explanation
3 0
2 years ago
The Vacaville tax assessor determined that the market value of the Perry’s house is $132,000. The rate of assessment in Vacavill
Oksanka [162]

Answer:

  $3217.50

Step-by-step explanation:

The tax is computed as ...

  ($132,000)(1/2)(48.75/1000) = 66·48.75 = 3217.50

The real estate tax on the Perry's house is $3217.50.

5 0
2 years ago
The distance between points F and H is 3 units, and the distance between points H and G is 4 units. What is the distance between
noname [10]

Answer:

{4}^{2}  +  {3}^{2}  = 16 + 9 =  \sqrt{25}  = 5

8 0
2 years ago
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