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Ahat [919]
2 years ago
14

HELP PLEASE FOR BRAINLEIST ​

Mathematics
1 answer:
strojnjashka [21]2 years ago
5 0

Answer:

First one is c because 3 1/2 - 1/2=3

Second one is also c because 0.9x2=1.8

And third one c is because 2 2/3:3/1=1 1/8

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Step-by-step explanation:

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Write the following expression. The quantity 81 minus 5k, squared
Stella [2.4K]

Answer:

81-25k²

Step-by-step explanation:

We need to write the expression for "The quantity 81 minus 5k, squared".

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6 0
3 years ago
We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of
sergiy2304 [10]

Answer:

Margin of error = 0.773

Step-by-step explanation:

We are given the following information in the question.

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\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.729  

Margin of error:

t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

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1.729(\frac{2}{\sqrt{20}} ) = 0.773  

7 0
3 years ago
What is 80.68 +79.56 equal
Sunny_sXe [5.5K]
<span>What is 80.68 +79.56 equal?
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2 years ago
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