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Marrrta [24]
2 years ago
12

Help pls no links I'll give briliantest to who ever gives me the right answer ​

Mathematics
1 answer:
gladu [14]2 years ago
6 0

Answer:

A. 57 7/9

Step-by-step explanation:

4  1/3 x  3  1/3 = 14  4/9

14 4/9 x 4 = 57 7/9

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Choose the best answer from among choices below. A police department wants to find out if a correlation exists between x = the n
ira [324]
∑x = 5 + 7 + 8 + 4 + 11 + 12 + 8 + 7 = 62
(∑x)^2 = 62^2 = 3,844
x bar = 62 / 8 = 7.75
∑x^2 = 25 + 49 + 64 + 16 + 121 + 144 + 64 + 49 = 522

∑y = 79 + 82 + 83 + 81+ 86 + 89 + 91 + 84 = 675
(∑y)^2 = 455,625
y bar = 675 / 8 = 84.375
∑y^2 = 6,241 + 6,724 + 6,889 + 6,561 + 7,396 + 7,921 + 8,281 + 7,056 = 57,069

∑xy = 395 + 574 + 664 + 324 + 946 + 1,068 + 728 + 588 = 5,287
 
r = (∑xy - n(x bar)(y bar)) / (sqrt(∑x^2 - n(x bar)^2) sqrt(∑y^2 - n(y bar)^2)) = (5,287 - 8(7.75)(84.375)) / (sqrt(522 - 8(7.75)^2) sqrt(57,069 - 8(84.375)^2)) = (5,287 - 5,231.25) / (sqrt(522 - 480.5) sqrt(57,069 - 56,953.125)) = 55.75 / (sqrt(41.5) sqrt(115.875)) = 55.75 / 69.3456 = 0.8039




3 0
3 years ago
Which terms could be used as the first term of the expression below to create a polynomial written in standard form? Select five
vovikov84 [41]

Option C: -6rs^5

The last two terms given of the standard polynomial are:

\cdots + 8r^2s^4 +  3r^3s^3

This shows 2 patterns to us:

r 's degree is increasing per term in the given polynomial.

s 's degree is decreasing per term in the given polynomial.

The sum of powers of variates r and s is 2+4 = 3+3  = 6.

And since standard polynomial, the same pattern must be present in all terms of the series.

All options except C are not valid.

Option C has term -6rs^5 for which r's degree plus s's degree is 1 + 5 = 6.

And r's degree 1 <  s's degree 5.

Thus its a valid term to be putted as first term in standard form of polynomial in consideration.

Thus Option C: -6rs^5  is the needed expression.

Learn more here:

brainly.com/question/10127580

4 0
3 years ago
For the past 40 days. Naomi has been recording the number of customers at her restaurant between 10:00 AM and 11:00 AM. During t
igor_vitrenko [27]

Answer:

The experimental probability there will be fewer than 20 customers on the forty-first day is 5/8, .625, 62.5%.

Step-by-step explanation

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3 years ago
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evablogger [386]

Answer:

10.89

Step-by-step explanation:

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3 years ago
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tekilochka [14]

The answer is A.) 5 because it’s the smaller number

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3 years ago
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