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olya-2409 [2.1K]
3 years ago
14

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:

<u>Given</u>:

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

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

To find the <u>first term</u> in the series, substitute n = 1 into the expression:

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

The <u>common ratio</u> 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 <u>convergent.</u>

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

<u>Sum to infinity formula</u>:

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

6 0
1 year ago
Please help true or false
sertanlavr [38]
It’s is jdhdbdjdbjdbdjbjfbfTrue
3 0
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.
4 0
3 years ago
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