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4 years ago

What is 3 wholes and 3/4 divided by 165

Mathematics

1 answer:

Irina18 [472]4 years ago

8 0

Answer:

0.2272727

Step-by-step explanation:

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K=1/2mv^2 solve for v

jeka94

Answer:

$v=\sqrt{\frac{2k}{m}}$

Step-by-step explanation:

$k=\frac{mv^{2}}{2}$

$2k=mv^2$

$\frac{2k}{m}=v^2$

$v=\sqrt\frac{2k}{m}$

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4 years ago

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!

Alenkasestr [34]

Answer:

y=-2x-3 B

Step-by-step explanation:

reflected reverses the sign of the slope but with respect to the y-axis, the y-intercept stays the same sign and number

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3 years ago

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the width of a rectangle is 5 inches less than the length. The area is 80 square inches. Find the length and the width.

egoroff_w [7]

40 and 35 are the length and the width of the Rectangle

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3 years ago

How many 3s go into 8679

nignag [31]

Answer:

2,893

Step-by-step explanation:

divide 3 by 8679

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3 years ago

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Calculate the sample variance and sample standard deviation for the following frequency distribution of heights in centimeters f

Zolol [24]

Answer:

$\bar X = \frac{\sum_{i=1}^n X_i f_i}{n}= \frac{22026.1}{171}=128.81$

$s^2 = \frac{2839948.85- \frac{(22026.1)^2}{171}}{171-1}= 16.59$

$s= \sqrt{16.587}=4.07$

Step-by-step explanation:

For this case we can calculate the sample variance and deviation with the following table

Class Midpoint (Xi) fi Xi*fi Xi^2 *fi

120.6-123.6 122.1 17 2075.7 253443

123.7-126.7 125.2 49 6134.8 768077

126.8-129.8 128.3 29 3720.7 477365.8

129.9-132.9 131.4 41 5387.4 707904.4

133.0-136.0 134.5 35 4007.5 633158.8

___________________________________________

Total 171 22026.1 2839948.85

For this case we can calculate the mean or expected value with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i f_i}{n}= \frac{22026.1}{171}=128.81$

Now we can calculate the sample variance with the following formula:

$s^2 =\frac{\sum f_i X^2_i -[\frac{(\sum X_i f_i)}{n}]^2}{n-1}$

And if we replace we got:

$s^2 = \frac{2839948.85- \frac{(22026.1)^2}{171}}{171-1}= 16.59$

And the standard deviation would be the square root of the variance and we got:

$s= \sqrt{16.59}=4.07$

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4 years ago