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Gnoma [55]
2 years ago
11

Brenda needs to solve the system of linear equations below for her homework assignment. y = 9x – 70 y = 2x – 32 Which is a reaso

nable estimate of the solution to this system of linear equations?
Mathematics
2 answers:
lisabon 2012 [21]2 years ago
8 0

Step-by-step explanation:

We have y = 9x - 70 and y = 2x - 32.

=> 9x - 70 = 2x - 32

=> 7x = 38

=> x = 38/7 which is around 5.43.

worty [1.4K]2 years ago
3 0

Answer:

Equations are :--- y = 9x – 70 and y = 2x – 32

Substituting the value of y, we get

9x - 70 = 2x - 32 \\ 7x = 38 \\ x =  \frac{38}{7}  \\  \boxed{x = 5.43} \\ y = 9x - 70 \\ y = 9( \frac{38}{7} ) - 70 \\ \boxed{ y =  - 21.14}

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swat32

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lisov135 [29]

Answer:

The mean absolute deviation of this data \{9,13,43,55\} is MAD =19.

Step-by-step explanation:

The mean absolute deviation (MAD) of a dataset is the average distance between each data point and the mean. It gives us an idea about the variability in a dataset.

The steps to find the MAD include:

  1. find the mean (average)
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  3. take the absolute value of each difference
  4. find the mean (average) of these differences

To find the mean absolute deviation of this data \{9,13,43,55\} you must

Step 1: Calculate the mean.

\:mean=\bar{x}= \frac{9+13+43+55}{4} =\frac{120}{4}=30

Step 2: Calculate the distance between each data point and the mean and take the absolute value of each difference .

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Step 3: Add the distances together.

21+17+13+25=76

Step 4: Divide the sum by the number of data points.

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