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3 years ago

Find the mean of the group

Mathematics

1 answer:

rusak2 [61]3 years ago

4 0

Answer:

Mean = 328.15

Step-by-step explanation:

Given that,

The sum of fx = 30,847

The sum of f = 94

We need to find the mean of the group. We know that,

$\text{Mean}=\dfrac{\Sigma fx}{\Sigma f}$

Put all the values,

$\text{Mean}=\dfrac{30847}{94}\\\\=328.15$

So, the mean of the group is equal to 328.15.

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alex41 [277]

100-10=90

90÷2=45

Mr Bergen's age=45+10

=55 years old

Mrs Bergen's age=45 years old

8 0

3 years ago

What is the common ratio of the sequence -2, 6, -18, 54

dsp73

The common ratio of a geometric sequence is the ratio of any term to the one before it. Here, you can find it by

... 6/-2 = -3

or, if you prefer the minus sign in the numerator, ...

... -18/6 = -3

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3 years ago

Finding an Equation of a Tangent Line In Exercise, find an equation of the tangent line to the graph of the function at the give

LenaWriter [7]

Answer:

Equation of tangent will be $y=\frac{x}{e}$

Step-by-step explanation:

We have given the function $y=x^2e^{-x}$

We have to find the equation of tangent at the point $(1,\frac{1}{e})$

Equation of tangent is equal to $\frac{dy}{dx}$

So $\frac{dy}{dx}=x^2\frac{d}{dx}e^{-x}+e^{-x}\frac{d}{dx}2x=-x^2e^{-x}+2e^{-x}$

Now we have given point $(1,\frac{1}{e})$

So putting these points in the equation of tangent

$\frac{dy}{dx}=-1^2e^{-1}+2e^{-1}$

$\frac{dy}{dx}=\frac{1}{e}$

Now equation of tangent passing through $(1,\frac{1}{e})$

$y-\frac{1}{e}=\frac{1}{e}(x-1)$

$y=\frac{x}{e}-\frac{1}{e}+\frac{1}{e}=\frac{x}{e}$

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3 years ago

Find the area of the regular polygon?

d1i1m1o1n [39]

Answer:

A=(n * s * a) 2A=(n*s*a)2

Step-by-step explanation:

A=(n * s * a) 2A=(n*s*a)2 where n is the number of sides, s is the length of one side and a is the apothem

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3 years ago

Which comparsion is true <br> 1.62.1>63<br> 8 6.25

zepelin [54]

Answer:

8 > 6.25 is true and 1.621 > 63 is false.

Step-by-step explanation:

5 0

3 years ago

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