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azamat
4 years ago
15

Max has x dollars. Keisha has four more dollars than Max.

Mathematics
2 answers:
viva [34]4 years ago
8 0
The answer is A) if there is not a answer for  x+4

Mice21 [21]4 years ago
7 0

Answer:

None of the option is correct.

Step-by-step explanation:

Given : Max has x dollars. Keisha has four more dollars than Max.

To find : What are the expressions ?

Solution :

Max has x dollars.

The expression is 'x'

Keisha has four more dollars than Max.

The expression is 'x+4'

The total amount of money Keisha and Max have together is given by,

A=x+x+4

A=2x+4

None of the option is correct.

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Step-by-step explanation:

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Find the standard deviation of 21, 31, 26, 24, 28, 26
Vesnalui [34]

Given the dataset

x = \{21,\ 31,\ 26,\ 24,\ 28,\ 26\}

We start by computing the average:

\overline{x} = \dfrac{21+31+26+24+28+26}{6}=\dfrac{156}{6}=26

We compute the difference bewteen each element and the average:

x-\overline{x} = \{-6,\ 5,\ 0,\ -2,\ 2,\ 0\}

We square those differences:

(x-\overline{x})^2 = \{36,\ 25,\ 0,\ 4,\ 4,\ 0\}

And take the average of those squared differences: we sum them

\displaystyle \sum_{i=1}^n (x-\overline{x})^2=36+25+4+4+0+0=69

And we divide by the number of elements:

\displaystyle \sigma^2=\dfrac{\sum_{i=1}^n (x-\overline{x})^2}{n} = \dfrac{69}{6} = 11.5

Finally, we take the square root of this quantity and we have the standard deviation:

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8 0
3 years ago
S(t)=sqrt3t+1 at t=2
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4. A gym membership is
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