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3 years ago

Which fraction is the greatest (represents the largest quantity) 1/3 3/8 2/5 1/2?

Mathematics

1 answer:

ale4655 [162]3 years ago

3 0

1/2 is the largest fraction out of all of them

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When you have -13+20 how exactly did you get 7?

BlackZzzverrR [31]

Answer: you start with a -13 right? well then you add a positive 20 which will then equal to 7 if you were adding a -20 then you get -33

Step-by-step explanation:

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3 years ago

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Set A of six numbers has a standard deviation of 3 and set B of four numbers has a standard deviation of 5. Both sets of numbers

Alenkinab [10]

Given:

$\sigma_A=3$

$n_A=6$

$\sigma_B=5$

$n_B=4$

$\overline{x}_A=\overline{x}_B$

To find:

The variance. of combined set.

Solution:

Formula for variance is

$\sigma^2=\dfrac{\sum (x_i-\overline{x})^2}{n}$ ...(i)

Using (i), we get

$\sigma_A^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{n_A}$

$(3)^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$9=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$54=\sum (x_i-\overline{x}_A)^2$

Similarly,

$\sigma_B^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{n_B}$

$(5)^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$25=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$100=\sum (x_i-\overline{x}_B)^2$

Now, after combining both sets, we get

$\sigma^2=\dfrac{\sum (x_i-\overline{x}_A)^2+\sum (x_i-\overline{x}_B)^2}{n_A+n_B}$

$\sigma^2=\dfrac{54+100}{6+4}$

$\sigma^2=\dfrac{154}{10}$

$\sigma^2=15.4$

Therefore, the variance of combined set is 15.4.

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3 years ago

ASAP HELP<br> This is due today so answer correct and I have attempt to do your best

Kamila [148]

Answer:

3) x-axis: 1 unit

y-axis: 10 units

4) quadrant II

coordinates: (-2, 4)

7) Quadrants I and IV; time is always positive , but temperature can be positive and negative

8) W = (-0.75, -1)

Step-by-step explanation:

3) x-axis: 1 unit

y-axis: 10 units

4) quadrant II

coordinates: (-2, 4)

7) Quadrants I and IV; time is always positive , but temperature can be positive and negative

8) W = (-0.75, -1)

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2 years ago

A dressmaker needs to cut 12-inch pieces of ribbon from rolls of ribbon that are 9 feet in length. How many 12-inch pieces can t

Tems11 [23]

Answer:

so the question is very interesting and the answer is 12 × 15 so the answer is 180 rolls of ribbons

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3 years ago

At a book store there are 25 books on the clearance section. 20 of the books are young adult novels and the rest of the books ar

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The statement that is not true is A

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