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3 years ago

Pleas help anyone please

Mathematics

1 answer:

Soloha48 [4]3 years ago

3 0

One percent of 450 can be found by dividing 450 by 100, which is 4.5. so one percent in this case = 4.5. to find the percent increase of 81 people to 450, divide 81 by 4.5, which is 18. so it is an 18% increase.

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I am a multiple of 70 I am between 300 and 500 I am 20 more than a multiple of 100 who am I?

Harlamova29_29 [7]

#420

because 70x4=420 within 300 and 500 and is greater than 400 which is a multiple of 100

8 0

4 years ago

Where does the line y = 4x + 1 intersect the y-axis (the y-intercept)?

Nataliya [291]

Answer:

(0,1)

Step-by-step explanation:

The equation for slope is y=mx+b.

The b value stands as the y - intercept.

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3 years ago

Alana is 4 years older than her brother Ernie Ernie is two years older than her sister Amelia Amelia is 10 years younger than th

OverLord2011 [107]

Answer:

Alana is 13 years old.

Step-by-step explanation:

Assuming you meant Mazo = Maisel,

You start from the bottom:

Amelia is 10 years younger than 17-year-old Maisel.

Amelia is 7 years old. (17-10)

Ernie is 2 years older than 7-year-old Amelia.

Ernie is 9. (2+7)

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Hope this helps!

-EmV

4 0

3 years ago

Find the mean and standard deviation for the set of data.

dem82 [27]

The mean and standard deviation for the set of data will be 16 and 5.87. Then the correct option is A.

<h3>What is a standard deviation?</h3>

It is the measure of the dispersion of statistical data. Dispersion is the extent to which the value is in a variation.

The set of data is given below.

16, 22, 8, 5, 20, 18, 14, 17, 24

The mean of the data set will be

μ = (16 + 22 + 8 + 5 + 20 + 18 + 14 + 17 + 24) / 9

μ = 144 / 9

μ = 16

Then the standard deviation of the data set will be

$\rm \sigma = \sqrt{\dfrac{\Sigma (x_i - \mu)^2}{n}} \\\sigma = \sqrt{\dfrac{(16 - 16)^2 +(22 - 16)^2 + (8-16)^2 + ......+(24-16)^2 }{9}} \\\sigma = \sqrt{\dfrac{310}{9}}\\$

Simplify the expression further, then we have

σ = √34.44

σ = 5.87

The mean and standard deviation for the set of data will be 16 and 5.87.

Then the correct option is A.

More about the standard deviation link is given below.

brainly.com/question/12402189

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1 year ago

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vitfil [10]

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1 year ago