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3 years ago

How much is 48.9 miles in minutes? (I really need help )

Mathematics

1 answer:

IceJOKER [234]3 years ago

7 0

Answer:

0.815

Step-by-step explanation:

just used a miles to minute convert caculator.

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Laura babysat 8 nights during the month of July. She earned $22, $30, $35, $25, $25, $20, and $27 for seven nights. How much did

Svet_ta [14]

Answer:

$28

Step-by-step explanation:

Given:

data = [22,30,35,25,25,20,27]

For eight night, the new list is:

new_data = [22,30,35,25,25,20,27,x]

Mean = 26.50

Mean Formula:

$\displaystyle \large{m=\dfrac{x_1+x_2+x_3+...+x_n}{n} }$

Therefore:

$\displaystyle \large{26.50=\dfrac{22+30+35+25+25+20+27+x}{8}}$

Multiply both sides by 8:

$\displaystyle \large{26.50\cdot 8=\dfrac{22+30+35+25+25+20+27+x}{8} \cdot 8}\\\displaystyle \large{212=22+30+35+25+25+20+27+x}$

Solve for x:

$\displaystyle \large{212=22+30+35+25+25+20+27+x}\\\displaystyle \large{212=184+x}$

Subtract 184 both sides:

$\displaystyle \large{212-184=184+x-184}\\\displaystyle \large{28=x}$

Therefore, she will earn $28 in eighth night

The attachment below is the result of combining all eighth data as we get 26.5 through python language with numpy package.

7 0

2 years ago

Read 2 more answers

Hey Siri's population rose 3% in one year, the next year and by 0.08 the next year, and by 2/50 the next year.Order these Increa

MArishka [77]

3% = 0.03
2/50 = 0.04

6 0

3 years ago

The toco toucan, the largest member of the toucan family, possesses the largest beak relative to body size of all birds. This ex

grandymaker [24]

Answer:

$m=\frac{332}{182}=1.824$

$b=\bar y -m \bar x=43.615-(1.824*21)=5.311$

So the line would be given by:

$y=1.824 x +5.311$

Step-by-step explanation:

We assume that the data is this one:

x: 15 16 17 18 19 20 21 22 23 24 25 26 27

y: 33 34 33 36 36 47 52 51 41 50 49 50 55

Find the least-squares line appropriate for this data.

For this case we need to calculate the slope with the following formula:

$m=\frac{S_{xy}}{S_{xx}}$

Where:

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}$

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}$

So we can find the sums like this:

$\sum_{i=1}^n x_i =273$

$\sum_{i=1}^n y_i =567$

$\sum_{i=1}^n x^2_i =5915$

$\sum_{i=1}^n y^2_i =25547$

$\sum_{i=1}^n x_i y_i =12239$

With these we can find the sums:

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=5915-\frac{273^2}{13}=182$

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}=12239-\frac{273*567}{13}=332$

And the slope would be:

$m=\frac{332}{182}=1.824$

Nowe we can find the means for x and y like this:

$\bar x= \frac{\sum x_i}{n}=\frac{273}{13}=21$

$\bar y= \frac{\sum y_i}{n}=\frac{567}{13}=43.615$

And we can find the intercept using this:

$b=\bar y -m \bar x=43.615-(1.824*21)=5.311$

So the line would be given by:

$y=1.824 x +5.311$

6 0

3 years ago

WILL GIVE BRAINLIEST! THIS IS 20PTS! Which mathematical property is demonstrated? If x = –3 and –3 = z, then x = z. A.) symmetri

lutik1710 [3]

Answer:

B.) transitive property of equality

Step-by-step explanation:

x = –3 and –3 = z, then x = z.

Symmetric property of equality: if a = b then b = a

Transitive property of equality: if a = b and b = c, then a = c

Closure property of multiplication: the set is closed under multiplication

Closure property of addition: the set is closed under addition

5 0

3 years ago

Read 2 more answers

What is the answer to this (12-9i)+(32-6i)

Diano4ka-milaya [45]

44 - 15 i is the correct answer

5 0

3 years ago

Read 2 more answers