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igor_vitrenko [27]
3 years ago
7

Please answer correctly !!!!!!!! Will mark brainliest answer !!!!!!!!!!!!

Mathematics
1 answer:
lbvjy [14]3 years ago
6 0

Answer:

it was X =5

Step-by-step explanation:

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A bag contains 5 yellow marbles and 10 blue marbles. If a representative sample contains 2 yellow ​marbles, then how many blue m
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Answer:

There will be 4 blue marbles

Step-by-step explanation:

Yellow to blue marbles is in a ratio of:

5:10

the representative sample is:

2:x

simplee cross multiplication can be aplied

5x = 2*10

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divide both sides by 5

x = 4

there should be four blue marbles

4 0
3 years ago
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What does standard deviation mean?
Sveta_85 [38]
Standard deviation is: It is a measure of how spread out numbers are. It is the square root of the Variance, and the Variance is the average of the squared differences from the Mean.

For example: To find the standard deviation, you have to add up all the numbers in the data set, then divide by how many numbers there are, and that will get you your answer.

Example,  Say your data set is: 9, 2, 5, 4, 12, 7, 8, 11, 9, 3, 7, 4, 12, 5, 4, 10, 9, 6, 9, 4.

The Mean is: 9 + 2 + 5 + 4 + 12 + 7 + 8 + 11 + 9 + 3 + 7 + 4 + 12 + 5 + 4 + 10+ 9 + 6 + 9 + 4. Over 20. That equals: 104 over 20 = 7.

So, the Standard Variance and  Mean is: 7 for this problem.

Hope I helped!

- Debbie
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3 years ago
The time (t) it takes to clean an office building is directly related to the number of people (p) working. Which of the followin
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Answer:

The time (t) it takes to clean an office building is <em><u>directly</u></em> <em><u>related</u></em> to the number of people (p) working.

t is proportional to p

t = kp \\  \boxed{\red{\frac{t}{p}  = k}}

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Tan (angle B) using an exact expression in trigonometric ratios in right triangles
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The value of the tangent of an angle is the ratio (opposite side) / (adjacent side).

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Jack invested $2,900 in an account paying an interest rate of 8 % compounded
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Answer: $628

Step-by-step explanation:

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