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Law Incorporation [45]
3 years ago
13

Subtract the following polynomials. (5x2+6)−(6x−5x2) im bad at math ;-;

Mathematics
2 answers:
olga55 [171]3 years ago
7 0

(5x^2+6)-(6x-5x^2)

5x^2 -- 5x^2 = 10x^2

10x^2 -6x + 6

Eddi Din [679]3 years ago
5 0

Answer:

First off if you want this answered make sure it's clear when your multiplying or using X

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slavikrds [6]

Answer:

A and E

Step-by-step explanation:

9^3 / 9^3

Same number on top and bottom so 1 is an answer

look at the exponents, when dividing with exponents, you just subtract them, so it could also be 9^0, which is also 1

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Given that<br> x:8=2:x<br> Calculate the positive value of x.
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Answer:

x = 4

Step-by-step explanation:

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Is 2 divided by two and 1 half equal to one half
Ronch [10]

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You're a quality control manager in a fruit juice company. You want to choose
alekssr [168]

Answer:

246.

Step-by-step explanation:

a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78

b) The minimum sample size to achieve this is 246.

Step-by-step explanation:

We have that to find our  level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of .

So it is z with a pvalue of , so  

Now, find the margin of error M as such

In which  is the standard deviation of the population(square root of the variance) and n is the size of the sample. So in this question,  

The lower end of the interval is the sample mean subtracted by M. So it is 99 - 0.78 = 98.22

The upper end of the interval is the sample mean added to M. So it is 99 + 0.78 = 99.78.

a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78

(b) (5 points) If we want the sampling error to be no greater than 0.5, what is the minimum sample size to achieve this based on the same confidence level with part (a)

We need a sample size of n

n is found when  

Then

Rounding up

The minimum sample size to achieve this is 246.

7 0
3 years ago
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