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3 years ago

Plz Help! I need this ASAP! I will give brainlest!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

viktelen [127]3 years ago

7 0

7) 164.26

8)77.08

9)2405.364

steps for 7) attached

steps for 8)

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I need some help plz???

GaryK [48]

I think the ones that would apply to this would be a. b. and c.

Since they are on the same line the slope doesn't change!

Hope I helped :)

6 0

3 years ago

Bryce wrote the linear regression equation y = 1.123 x minus 6.443 to predict the armspan, y, of a person who is x inches tall.

Verdich [7]

Answer:

equation is y = 1.123x -6.443 where y represents the armspan and x represents the height . Now we need to find the height , when armspan = 67.5 inches. SO we need to plug 67.5 for y and solve for x that is

67.5 = 1.123x -6.443

adding 6.443 to both sides

67.5 +6.443 =1.123x

73.943 = 1.123x

Dividing both sides by 1.123

x = 65.84 inches .

So for the given armspan of 67.5 inches, height is 65.84 inches .

Step-by-step explanation:

3 0

3 years ago

<img src="https://tex.z-dn.net/?f=%20%5Cdisplaystyle%20%5Csum_%7Bn%20%3D%201%7D%5E%7B%20%5Cinfty%20%7D%20%20%7B4%7D%5E%7B%20-%20

r-ruslan [8.4K]

Answer:

$\dfrac{1}{3}$

Step-by-step explanation:

Given:

$\displaystyle \sum^{\infty}_{n=1} 4^{-n}$

The sigma notation means to find the sum of the given geometric series where the first term is when n = 1 and the last term is when n = ∞.

To find the first term in the series, substitute n = 1 into the expression:

$\implies a_1=4^{-1}=\dfrac{1}{4}$

The common ratio of the geometric series can be found by dividing one term by the previous term:

$\implies r=\dfrac{a_2}{a_1}=\dfrac{4^{-2}}{4^{-1}}=\dfrac{1}{4}$

As | r | < 1 the series is convergent.

When a series is convergent, we can find its sum to infinity (the limit of the series).

Sum to infinity formula:

$S_{\infty}=\dfrac{a}{1-r}$

where:

a is the first term in the series
r is the common ratio

Substitute the found values of a and r into the formula:

$S_{\infty}=\dfrac{\frac{1}{4}}{1-\frac{1}{4}}=\dfrac{1}{3}$

Therefore:

$\displaystyle \sum^{\infty}_{n=1} 4^{-n}=\dfrac{1}{3}$

Learn more about Geometric Series here:

brainly.com/question/27737241

brainly.com/question/27948054

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1 year ago

Please help true or false

sertanlavr [38]

It’s is jdhdbdjdbjdbdjbjfbfTrue

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2 years ago

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What is the perimeter of the figure in the diagram (round to three decimal places if necessary)?

Pavlova-9 [17]

It would be, D) 28.472.

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3 years ago

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