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nordsb [41]
3 years ago
11

What is the value of X

Mathematics
2 answers:
Anton [14]3 years ago
6 0

:p hello . . . .. . . . . . . . . . . .. . .

maw [93]3 years ago
3 0

Answer:

x = 30

Step-by-step explanation:

The two angles add to a right angle which is 90 degrees

30 +2x = 90

Subtract 30 from each side

30 +2x - 30 =90-30

2x= 60

Divide each side by 2

2x/2 = 60/2

x = 30

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Answer:

B. 359

Step-by-step explanation:

Given that:

The margin of error (e) must be within 0.3 unit, The standard deviation (σ) = 2.9 and the the confidence level = 95% = 0.95

α = 1 =0.95 = 0.05

\frac{\alpha}{2}=\frac{0.05}{2}=0.025

The z score of 0.025 corresponds to the z score of 0.0475 (0.5 - 0.025) which can be gotten from the normal probability table.

Therefore: z_\frac{\alpha}{2}= z_{0.025}=1.96

The formula for the margin of error is given by:

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Therefore the smallest sample size (n) is 359

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3 years ago
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3 years ago
Will do a brianly! ​Subtract.
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the yellow one is correct, I did the math. I am 99% sure this is correct, but I would love it if you privately texted me if this is not the answer.

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Good luck

7 0
3 years ago
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