3,-10, -2, 13, 11 The mean is

Mathematics

2 answers:

kupik [55]3 years ago

7 0

Answer:

The Mean is 3

Step-by-step explanation:

For future reference, here's how to solve the mean.

1.Add up all data values to get the sum

2.Count the number of values in your data set and divide the sum by that number.

In this problem, there are 5 values, and all the values added together equals 15. Divide 15 by 5 and you get 3. The mean is 3.

Pavlova-9 [17]3 years ago

5 0

3+(-10)+(-2)+13+11= 3

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The speed of a stream is 4km/h. A boat travels 6 km upstream in the time it takes to travel 12 km downstream. What is the speed

Usimov [2.4K]

6 km × 1 hour/(b-4 km) = 12 km × (1 hour/(b+4 km)

6/(b-4) hours = 12/(b+4) hours

6(b+4) = 12(b-4)

6b + 24 = 12b - 48
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4 0

3 years ago

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katovenus [111]

$\displaystyle\\
1 \frac{2}{5} +\Big(-5 \frac{1}{2} \Big) = ? \\ \\ 
1 \frac{2}{5} = \frac{1\times 5+2}{5}=\boxed{\frac{7}{5}} \\ \\ 
-5 \frac{1}{2} =-5 -\frac{1}{2} = \frac{-5\times2-1}{2} =\frac{-10-1}{2}=\frac{-11}{2}= \boxed{-\frac{11}{2} }\\ \\ \texttt{OR} \\ \\ 
-5 \frac{1}{2} = -\Big(5 \frac{1}{2} \Big)= -\Big( \frac{5\times2+1}{2} \Big)=-\Big( \frac{11}{2} \Big)= \boxed{-\frac{11}{2} }$

$\displaystyle\\
\Longrightarrow ~~1 \frac{2}{5} +\Big(-5 \frac{1}{2} \Big) =\frac{7}{5} -\frac{11}{2} = \frac{7\times 2}{5\times 2} -\frac{11\times 5}{2\times 5} = \\ \\ 
= \frac{14}{10} -\frac{55}{10} = \frac{14-55}{10} =\frac{-41}{10} = -\frac{41}{10}=-\frac{40+1}{10}=\boxed{\boxed{-4\frac{1}{10}}}$

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3 years ago

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avanturin [10]

Answer:

7x + 7

Step-by-step explanation:

2x + 5x = 7x

5 +2 = 7

4 0

3 years ago

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