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3 years ago

Find the mean of the first 7 odd prime number?

Mathematics

1 answer:

bekas [8.4K]3 years ago

6 0

Answer: 75/7 or 10.71 (rounded)

Step-by-step explanation:

Mean = Average

To find the average you should add all the numbers together and then divide it by the amount of numbers.

In this question, the formula is $\frac{n_1+n_2+n_3+n_4+n_5+n_6+n_7}{7}$

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The list of the first 7 odd prime numbers:

3, 5, 7, 11, 13, 17, 19

Now, add them together

3+5+7+11+13+17+19=75

Divide the sum by 7

75÷7=75/7=10.71 (rounded)

Hope this helps!! :)

Please let me know if you have any questions

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Point F is on line segment EG given EG=5x + 7, EF=5x, and FG=2x - 7, determine the numerical length of FG

myrzilka [38]

Answer:

$FG = 7$

Step-by-step explanation:

Given

$EG = 5x + 7$

$EF = 5x$

$FG = 2x - 7$

Required

Determine the length of FG

Since, F is on segment EG, then

$EG= EF + FG$

Substitute values for EG, EF and FG

$5x + 7 = 5x + 2x - 7$

Collect Like Terms

$5x - 5x - 2x = -7 - 7$

$- 2x = -14$

Solve for x

$x = -14/-2$

$x = 7$

Substitute 7 for x in $FG = 2x - 7$

$FG = 2 * 7- 7$

$FG = 14- 7$

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Answer:

Step-by-step explanation:

Let

Price of

Hotdogs = x

Sodas = y

Candy bar = z

Smith family

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Sodas = 2

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3x + 2y + z = 16.50

Patterson family

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Nguyen family

Hotdogs = 2

Sodas = 1

Candy bar = 3

Total cost = $13.75

2x + y + 3z = 13.75

The equations

3x + 2y + z = 16.50 (1)

4x + 4y + 2z = 26 (2)

2x + y + 3z = 13.75 (3)

Multiply (1) by -2

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-6x - 4y - 2z = -33

-6x - 4y - 2z = -33 (1a)

4x + 4y + 2z = 26 (2)

Add (1a) and (2)

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x = -7/-2

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Multiply (3) by -4

-4(2x + y + 3z = 13.75) (3)

-8x - 4y - 12z = -55 (3a)

Add (3a) and (2)

-8x - 4y - 12z = -55 (3a)

4x + 4y + 2z = 26 (2)

-8x + 4x -12z + 2z = -55 + 36

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Substitute the value of x into

-4x - 10z = -29

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z = -15 / - 10

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Substitute values of x and z into (1)

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2y = 4.50

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Find the mean of the first 7 odd prime number?​

Find the mean of the first 7 odd prime number?