Melissa’s birthday is next week and she has been receiving cards in the mail with different amounts of money. She has received 5 cards with the following amounts: $10, $20, $ 25, $30, $40. If Melissa receives one more card in the mail with $25, which of the following will happen?

Answers

Answer 1

Answer: We have to choose an answer that best describes what will happen with the standard deviation. First we have to calculate the Mean without last $25. Mean 1= ( 10 + 20 + 25 + 30 + 40 ) / 5 = 25. Standard deviation: SD 1 = sqrt( ( 225 + 25 + 0 + 25 + 225 ) / 5 ) = sqrt ( 500/5 ) = sqrt ( 100 ) = 10. Then we have to calculcate the Mean with additional $25 : Mean 2 = ( 10 + 20 + 25 + 30 + 40 + 25 ) / 6 = 25 ( same again ). The new Standard Deviation: SD 2 = sqrt ( ( 225 + 25 + 0 + 25 +225 + 0 ) / 6 ) = sqrt( 500 / 6 ) = sqrt ( 83.33 9 = 9.13. 9.13 < 10. Answer: The standard deviation A ) Decreases.

Answer 2

Answer:

Answer:

a and b

Step-by-step explanation:

its right

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Thank you all in advance!!!

Answers

Does it ask you to round to the nearest whole number? If so, the answer is 53. If it doesn't, then it should be 53.4

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Answers

Say that you buy 30 apples for $20, you take how many apples there are and divide it by how much they cost, they cost $1.5 per apples (looks like this, Unit/Rate)

25 teenagers were surveyed about food. 5 more preferred pizza than steak. Write and solve a system of equations to find out how many preferred pizza.

Answers

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Name the property that the equation illustrates. Explain. –0.3 + 0.3 = 0 A. Identity Property of Addition; 0 is part of the equation. B. Inverse Property of Multiplication; a number and its inverse are multiplied. C. Inverse Property of Addition; a number and its inverse are added.

Answers

Answer is choice C) Inverse property of addition; a number and its inverse are added

The number is 0.3 and its additive inverse is -0.3, which add to 0. You can flip things around to say that the number is -0.3 and its additive inverse is 0.3 to add them to the same result of 0. The order of addition doesn't matter. It's like saying 2+3 = 5 and 3+2 = 5

Help!!!! How do I solve this

Answers

Answer:

-11

Step-by-step explanation:

So, using the fact that one x intercept is 7, and the vertex is (-2,-4), we can solve for the other x intercept. While there are many ways to solve this, the way I prefer to do it is to realize that the x intercepts are the same distance away from the vertex. this means that if the vertex is at x = -2, and one x intercept is at x = 7, the other will be at -11, as 7+2 = -2+11.

I’m pretty sure that the other x-intercept is -7

How do you divide 117 into 2.25

Answers

9 x 13 = 117

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2.25 x 4 = 9

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Therefore:

2.25 x 4 x 13 =117

2.25 x 52 = 117

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Therefore:

117/(2.25) = 52

Therefore:

(2.25)/117 = 1/52

um...you could use long division. if u wanted the answer, then it is 52.
HOPE I HELPED!!!

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