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3 years ago

BRAILIEST IF RIGHT Which other expression has the same value as (-14) - 8 ?

Mathematics

1 answer:

stiks02 [169]3 years ago

4 0

Answer:

It's the last one (-14) +(-8)

Step-by-step explanation:

since (-14)-8 is -22 and the last one is also -22

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X-4/x-3 is less than 2x-1/2

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At an animal shelter there are 15 dogs 12 cats 3 snakes and 5 parakeets what percent less parakeets are there than dogs

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3 years ago

Please Help Me worth 20 points

rodikova [14]

Answer:

1.Amy should ask every 10th person leaving the school at the end of the day and Amy should ask the 50 students in her computer lab.

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3 years ago

Help me solve this algebra 1 question number 10

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Answer:

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Step-by-step explanation:

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3 years ago

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,

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

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

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3 years ago