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igor_vitrenko [27]
2 years ago
14

Robert is using the following data samples to make a claim about the house values in his neighborhood:

Mathematics
2 answers:
Natasha2012 [34]2 years ago
7 0

Answer:

He should use the mean because there are no outliers that affect the mean.

Step-by-step explanation:

luda_lava [24]2 years ago
3 0
Both mean and median are measures of the center of a set of data.
Mean is normally preffered to the median except if there is an outlier that has a tendency to affect the mean.
An outlier is a data point that significantly differs from the other data points in a sample.
In the data set above, there is no outlier that will affect the mean.
Therefore, he should use the mean because there are no outliers that affect the mean.
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The probability of Sandy flipping a coin twice and getting heads both times is 0.25. The probability of John's spinner stopping
Ede4ka [16]

0.25  and  1/4  are the same number.

If each one is the probability of some event,
then both events are equally likely.

7 0
3 years ago
Read 2 more answers
PLEASE HELP!!!! Which quadratic equation is part of the solution process for solving this rational equation using the least comm
Nadya [2.5K]

Step-by-step explanation:

A. x²-x-10=0

is part of the solution process for solving this rational equation using the least common denominator

4 0
2 years ago
Sydawna has two part-time jobs. Her earnings for one week are represented by the equation: E = 9.25g + 10.50t
Iteru [2.4K]

Answer:

  • 9 hours

Step-by-step explanation:

<u>Given the equation: </u>

  • E = 9.25g + 10.50t
  • E - weekly total, g- number of hours at gas station, t- number of hours at toy store.

<u>Substitute given values into equation and solve for the missing one:</u>

  • 219.75 = 9.25g + 10.5*13
  • 219.75 = 9.25g + 136.5
  • 9.25g = 219.75 - 136.5
  • 9.25g = 83.25
  • g = 83.25/9.25
  • g = 9

Sydawna works 9 hours at the gas station

4 0
2 years ago
Determine if the matrix below is invertible. Use as few calculations as possible. Justify your answer. [Start 4 By 4 Matrix 1st
Len [333]

Answer:

Yes, it is invertible

Step-by-step explanation:

We need to find in the matrix determinant is different from zero, since iif it is, that the matrix is invertible.

Let's use co-factor expansion to find the determinant of this 4x4 matrix, using the column that has more zeroes in it as the co-factor, so we reduce the number of determinant calculations for the obtained sub-matrices.We pick the first column for that since it has three zeros!

Then the determinant of this matrix becomes:

4\,*Det\left[\begin{array}{ccc}1&4&6\\0&3&8\\0&0&1\end{array}\right] +0+0+0

And the determinant of these 3x3 matrix is very simple because most of the cross multiplications render zero:

Det\left[\begin{array}{ccc}1&4&6\\0&3&8\\0&0&1\end{array}\right] =1 \,(3\,*\,1-0)+4\,(0-0)+6\,(0-0)=3

Therefore, the Det of the initial matrix is : 4 * 3 = 12

and then the matrix is invertible

4 0
2 years ago
If A + B = 2X -2 and A -B equals 4X -8, find A and B
Keith_Richards [23]
A=3X-3
B=-X+3
If A+B=2X-2, then using equalivant exchange A=2X-2-B and
B=2X-2-A
If A-B=4X-8, then A=4X-8+B and -B=4X-8-A(or B=-4X+8+A)
Since A equals both 2x-2-B and 4X-8+B we can add both equations to equal 2A=6X-6 now we devide that by 2 to get
A=3X-3
Do the exact same for B, so b equals both 2X-2-A and -4X+8+A
We can add them both to get 2B=-2X+6 and decide that by 2 to get B=-X+3
8 0
3 years ago
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