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Olenka [21]
3 years ago
15

Calculate the following sum : (3/10) + (6/10).

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
6 0

Answer:

\frac{3}{10}+\frac{6}{10} = \frac{9}{10} = 0.9

Step-by-step explanation:

Problem to solve:

\frac{3}{10}+\frac{6}{10}

since, the denominator of the given fractions are equal

Therefore, the number can be directly added as:

\frac{x}{a}+\frac{y}{a}=\frac{x+y}{a}

therefore,

\frac{3}{10}+\frac{6}{10} = \frac{3+6}{10}

or

= \frac{9}{10}

or in terms of decimal the answer can be represented as 0.9

Hence,

\frac{3}{10}+\frac{6}{10} = \frac{9}{10} = 0.9

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Solution: We are given the population mean =42

Now, in order to find which shift's mean is closest to population mean, we will find the mean of each shift.

The mean of shift 1 is:

Mean=\frac{18+25+56+42+29+38+54+47+35+30}{10}=\frac{374}{10}=37.4

The mean of shift 2 is:

Mean=\frac{23+19+50+49+67+34+30+59+40+33
}{10}=\frac{404}{10}=40.4

The mean of shift 3 is:

Mean=\frac{19+22+24+40+45+29+33+29+39+59  }{10}=\frac{339}{10}=33.9

The mean of shift 4 is:

Mean=\frac{21+23+25+40+35+19+70+40+22+23  }{10}=\frac{318}{10}=31.8

We clearly see the mean of shift 2 is close to the population mean. Hence the option B) Shift 2 is correct.

7 0
3 years ago
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Write an expression in simplified form for the area of each rectangle. Width: 5+2y Length:5
Katena32 [7]

Answer:

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Step-by-step explanation:

The area of a rectangle is

A = l* w where l is the length and w is the width

A = 5(5+2y)

Distribute

A = 25+10y

7 0
3 years ago
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If you flip the graph of the quadratic parent function, f(x) = x2, over the x-axis, what is the equation of the new function?
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I think the answer might be A.
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4 years ago
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The sum of three times a number and ten is negative 5
ki77a [65]
Yes 3n+10=-5 so it’s 5
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Answer:

A. is the correct one. The statement makes sense.

Step-by-step explanation:

A. This is true because if you make your graph starting from the lowest value then the graph will use more space to fit the data and it will make it look bigger. Also, the variation will seem higher because it will feel that you are increasing it from 0, so the relative increase will be higher.

B. Reducing the range of the vertical axis will increase the relative size of variation, not make it decrease, as we explained in A.

C. Even though it is technically certain that the data shown is the same as before, the way to show data also matters. And by making changes on the presentation of your data you can obtain different results on the impression that leaves to people.

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3 years ago
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