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3 years ago

1. Increase £92 by 40%

Mathematics

1 answer:

yanalaym [24]3 years ago

5 0

Answer:

1. Increase £92 by 40% = £128.8

2. Increase £150 by 13% = £169.5

3. Decrease £75 by 80% = £15

4. Decrease £440 by 18% = £360.8

Step-by-step explanation:

1. Increase £92 by 40%

40/100 + 92

0.4X92

36.8

92+36.8

£128.8

2. Increase £150 by 13%

13/100 X 150

0.13X150

19.5

150+19.5

£169.5

3. Decrease £75 by 80%

80/100 X 75

0.8X75

75-60

£15

4. Decrease £440 by 18%

18/100 X 440

0.18X440

79.2

440-79.2

£360.8

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Below are the jersey numbers of 11 players randomly selected from a football team. Find the range, variance, and standard deviat

Aleksandr-060686 [28]

Answer:

Range = 71

Variance = 546.0

Standard Deviation = 23.4

Option A) Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless.

Step-by-step explanation:

We are given the following data set in the question:

33, 29, 97, 56, 26, 78, 83, 74, 65, 47, 58

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

$\text{Variance} = \displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{646}{11} = 58.7$

Sum of squares of differences = 5460.18

$\text{Variance} = \frac{5460.18}{11} = 546.0$

$S.D = \sqrt{\frac{5460.18}{10}} = 23.4$

Sorted Data Set: 26, 29, 33, 47, 56, 58, 65, 74, 78, 83, 97

Range = Maximum - Minimum

Range = 97 - 26 = 71

Based on the values, we can say that

Option A) Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless.

6 0

3 years ago

What is x equal to in the problem 10+3(x+2)=36? Please show your work.

scZoUnD [109]

Answer:

x = 6 2/3

Step-by-step explanation:

10+3(x+2)=36

10+3x+6=36 Solve inside the parenthesis.

16+3x=36 Combine like terms.

-16 -16 Subtract 16 from both sides.

3x/3=20/3 Divide both sides by 3.

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3 years ago

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seraphim [82]

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3 years ago

Question 10 Please Help

svet-max [94.6K]

Answer:

1)· 5x + 2y = 9. First we solve for y. 2y= 9 -5x. y=(9-5x)/2. Now that we have the value of y. We substitute on the original equation and resolve. 5x + 2y = 95x + 2y = 9 5x + 2(9-5x)/2 = 9 5x + 9 - 5x = 9 9 = 9

That would be x = 1

Now substitute and resolve to find y.

5(1) + 2y = 9

5 + 2y = 9

2y = 4

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So our answer x=1 and y = 2. (1,2)

Proof :

5(1) + 2(2) = 9

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9 = 9

Step-by-step explanation:

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2 years ago

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suter [353]

Answer:

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Step-by-step explanation:

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3 years ago