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Ann [662]
3 years ago
7

Problems in the picture

Mathematics
2 answers:
Zepler [3.9K]3 years ago
7 0

hope it helps you!!!!!!!!!!

poizon [28]3 years ago
7 0

-6x + 8y = -6

7x -10y = 9

Let's eliminate the Y values by multiplying each equation by a number to make the coefficients of Y opposite.

-6x + 8y = -6 x 5 = -30x +40y = -30

7x -40y = 9 x 4 = 28x - 40y =36

Now add the two equations together:

-30x + 28x = -2x

40y +-40y = 0

-30 + 36 = 6

Now you have:

-2x = 6

Divide both sides by -2:

x = 6 / -2

x = -3

The answer is -3

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The following data was collected from the manufacturing of an auto component. It represents the diameter (in mm) of that compone
kari74 [83]

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14.6

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(A). STEP ONE: Calculate the mean

(1). Row one = (10 + 12 + 12 + 14 ) = 48/4 = 12.

(2). Row Two: (12 + 11 + 13 + 16 ) = 52/4 = 13.

(3). Row three : (11 + 13 + 14 + 14)/4 = 13.

(4). Row four: (11 + 10 + 7 + 8)/4 = 36/4 = 9.

(5). Row five: (13 +12 + 14 + 13)/4 = 52/4 = 13.

(B). STEP TWO:

- determine the maximum and minimum value for each row.

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Maximum values for each row:

Row one = 14, row two= 16, row three = 14, row four = 11 and row five = 14.

Minimum value for each row:

Row one = 10, row two = 11, row three = 11, row four =7 and row five = 12.

DIFFERENCES in each row :

row one = 14 - 10 = 4, row two = 16 - 11 = 5, row three = 14 - 11 = 3, row four = 11 - 7 = 4 and row five = 14 -12 = 2.

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(D). STEP FOUR : Calculate the Average Range = 18/5 = 3.6.

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A = Average rage × 0.729 = 3.6 × 0.729.

B = overall mean = 12.

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