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3 years ago

9. The following data are the ages of eight male

Mathematics

2 answers:

Bess [88]3 years ago

8 0

The mean is 26 and the MAD is 3.75

dybincka [34]3 years ago

5 0

Answer:

The mean is 26 The mean absolute deviation is 3,2,1,5,5,10,3

Step-by-step explanation:

To find the mean you have to add all the numbers together and divide by 8 because there are 8 number so to find the mean absolute deviation of the data, start by finding the mean of the data set.

Find the sum of the data values, and divide the sum by the number of data values.

Find the absolute value of the difference between each data value and the mean: |data value – mean|.

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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! I CANNOT RETAKE THIS!!

liberstina [14]

Answer: C) x = 3, (x = 2 is an extraneous solution)

Step-by-step explanation:

$\frac{x}{x-1}$ - $\frac{1}{x-2}$ = $\frac{2x-5}{x^{2}-3x+2}$

$\frac{x}{x-1}$ - $\frac{1}{x-2}$ = $\frac{2x-5}{(x-1)(x-2)}$

Restrictions: Denominator cannot equal zero (x - 1 ≠ 0) and (x - 2 ≠ 0), so x ≠ 1 and x ≠ 2

$(x - 1)(x - 2)\frac{x}{x-1}$ - $(x - 1)(x - 2)\frac{1}{x-2}$ = $(x - 1)(x - 2)\frac{2x-5}{(x-1)(x-2)}$

x(x - 2) - 1(x - 1) = 2x - 5

x² - 2x - x + 1 = 2x - 5

x² - 3x + 1 = 2x - 5

-2x + 5 -2x + 5

x² - 5x + 6 = 0

(x - 2)(x - 3) = 0

x - 2 = 0 x - 3 = 0

x = 2 x = 3

NOTE: x = 2 is an extraneous solution because it is one of the restricted values.

4 0

3 years ago

Find the sum of a finite arithmetic sequence from n=1 to n=18, using the expression 4n-10

Zarrin [17]

Sum f(k)=4k-10 for k=1 to 18.

We sum each term separately and add the sums.

$\sum_1^{18}4k=4\sum_1^{18}k=4[18(1+18)/2]=4*9*19=684$
$\sum_1^{18}-10=-10\sum_1^{18}1=-10*18=-180$

Therefore the required sum is 684-180=504

8 0

3 years ago

Read 2 more answers

Find: (6m^5 + 3 - m^3 - 4m) - (-m^5 + 2m^3 - 4m + 6)

vitfil [10]

Answer:

7m^5 - 3m^3 - 3

Step-by-step explanation:

5 0

3 years ago

Name both pairs of alternate exterior angles

Gemiola [76]