In the past 6 days, adrion's travel time to school has varied: 22 minutes, 27 minutes, 34 minutes, 29 minutes, 20 minutes, and 18 minutes. the work shown is her calculation of the mean absolute deviation of the time traveled. which step contains the first error adrion made?

I think she made a mistake at step 4 because I know in order to find the mean absolute deviation of a number you must divide as the last step, not subtract and the rest of her work looks correct.

Step 4, because she should have divided rather than subtracting 6.

Step-by-step explanation:

The mean absolute deviation formula,

Where,

represents mean,

n represents the number of items,

x represents an item,

Here, data items are,

22, 27, 34, 29, 20, and 18

Thus, the steps for finding the mean absolute deviation are as follows,

Step 1 : Finding means,

Step 2 : absolute values of the given data items,

Step 3 : Sum of all absolute values,

Step 4 : Divide sum of absolute value by number of data items,

Hence, step 4 contains the first error, because she should have divided rather than subtracting 6.

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step-by-step explanation:

i hope this : )

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15