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cricket20 [7]
3 years ago
6

A coordinate plane.

Mathematics
2 answers:
iren2701 [21]3 years ago
8 0

Answer:

A  , B, and C

Step-by-step explanation:

i just did it

Eddi Din [679]3 years ago
7 0

Answer:

ABC

Step-by-step explanation:

edge

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Ksivusya [100]
It’s a right triangle :)
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3 years ago
Read 2 more answers
Use mathematical induction to prove that the statement is true for every positive integer n. Show your work.
never [62]
My first reasoning is the fact that the main number is 2
2nd reasoning is that 
2 x n = 4 
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kinsey jogs a 2 mile fitness trail. she stops to do stretching exercises every 1/5 mile. hote meant times does kinsey stop joggi
Fynjy0 [20]

Answer:

10 times

Step-by-step explanation:

Since every 1/5 of a mile she stops, that means she stops 5 times every mile. Multiply 5x2 because she jogged 2 miles, and the answer is 10!

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3 years ago
The standard deviation of test scores on a certain achievement test is 11.3. If a randomsample of 81 students had a sample mean
Svetradugi [14.3K]

Answer: (72.535, 76.665)

Step-by-step explanation:

The confidence interval for population mean is given by :-

\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}

, where \sigma = population standard deviation.

n= Sample size

\overline{x} = sample mean.

z^* = Critical z-value (two-tailed)

Given : \sigma=11.3

n= 81

\overline{x}=74.6

The critical values for 90% confidence interval : z^*=\pm1.645

Now, the confidence interval for population mean would be :

74.6\pm (1.645)\dfrac{11.3}{\sqrt{81}}\\\\=74.6\pm(1.645)(\dfrac{11.3}{9})\approx74.6\pm2.065\\\\=(74.6-2.065,\ 74.6+2.065)\\\\=(72.535,\ 76.665)

Hence, a 90 percent confidence interval estimatefor the average score of all students. : (72.535, 76.665)

8 0
3 years ago
Are 9x+15 and -9x-15 equivalent expressions
mixer [17]

Answer:

Step-by-step explanation:

Yes!

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3 years ago
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