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3 years ago

Quick is this right??? Answer and question in pic

Mathematics

1 answer:

Olin [163]3 years ago

3 0

Answer:

-199

Step-by-step explanation:

put -6 in place of x in equation

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Brand Number of Packets Cost

Sveta_85 [38]

Answer:

B) Brand 2

Step-by-step explanation:

Brand 1: $10.68 ÷ 12 = 0.89

Brand 2: $9.44 ÷ 16 = 0.59

Brand 3: $15.30 ÷ 18 = 0.85

Brand 4: $21.84 ÷ 24 = 0.91

Brand 5: $20.40 ÷ 30 = 0.68

Least cost per packet is of Brand 2

3 0

3 years ago

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A machine produces metal pieces that are cylindrical in shape. A sample of pieces is taken, and the diameters are found to be 1.

Ghella [55]

Answer:

99% confidence interval: (0.97816,1.03184)

Step-by-step explanation:

We are given the following data set:

1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 0.99, 1.01, 1.03

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{9.05}{9} = 1.005$

Sum of squares of differences = 0.00001975308642 + 0.001264197531 + 0.000597530864 + 0.001186419753 + 0.0002419753088, + 0.00065308642 + 0.0002419753088 + 0.00001975308642 + 0.000597530864 = 0.0048

$S.D = \sqrt{\frac{0.0048}{8}} = 0.024$

Confidence interval:

$\bar{x} \pm t_{critical}\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 8}~\alpha_{0.01} = \pm 3.355$

$1.005 \pm 3.355(\frac{0.024}{\sqrt{9}} ) = 1.005 \pm 0.02684 = (0.97816,1.03184)$

6 0

3 years ago

Find the volume of a cube? 8 inches

kozerog [31]

A cube has all it sides equal.

The volume of a cube is given by Length x Length x Length

$\begin{gathered} Volume=8X8X8inches^3 \\ \text{Volume = 512 inches }^3 \end{gathered}$

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1 year ago

A plaine's altitude changes by -1,000 feet. Is the plane going up or down?

SOVA2 [1]

The plane is going down.

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3 years ago

Line Q is represented by the following equation: 2x + y = 11 Which equation completes the system that is satisfied by the soluti

Mashcka [7]

X+y=8
this is because

x=3 y=5

3+5=8

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3 years ago

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