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Reika [66]
1 year ago
8

Pls help I’ll brainlest Pls help show ur work

Mathematics
1 answer:
tangare [24]1 year ago
5 0
Answer:

-x^2-x+2

Step by step explanation:

(x^2+1)-(2x^2+x-1)

x^2+1-(2x^2+x-1)

x^2+1-2x^2-x+1

-x^2+1-x+1

-x^2+2-x

-x^2-x+2
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How do i find the mean of a group of number's
inna [77]

Lets say your numbers are these...

10,20,30,40,50,60,70,80,90 and 100

you would add those to get 650

Now how many numbers did you add?

You added 10

so now divided

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you get 65

that is the mean of those numbers!

5 0
3 years ago
Read 2 more answers
You measure 47 backpacks' weights, and find they have a mean weight of 79 ounces. Assume the population standard deviation is 13
ki77a [65]

Answer:

3.14

Step-by-step explanation:

Given that:

Mean weight (m) = 79 ounces

Population standard deviation (s) = 13.1

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The margin of error is given by:

Zcritical * (standard deviation / sqrt(sample size)

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Hence,

Zcritical * (standard deviation / sqrt(sample size)

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1.645 * (13.1 / 6.8556546)

1.645 * 1.9108313

Hence, the margin of error is :

3.1433174885

= 3.14

8 0
3 years ago
Find a ratio that is<br> equivalent to 2:5.
Keith_Richards [23]

Answer:

4:10 hope this helps

Step-by-step explanation:

6 0
3 years ago
Help, ill give brainliest
larisa [96]

Answer:

Step-by-step explanation:

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2 years ago
WHAT IS THE DECIMAL FORM FOR 7 x 10 + 9 x (1/10) + 2 x (1/100) + 5 x (1/000)
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Step-by-step explanation:

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