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2 years ago

Please help with this question i have 1 hour to finish this test

Mathematics

2 answers:

Nimfa-mama [501]2 years ago

7 0

Answer:

pretty sure it's 29

Step-by-step explanation:

equation: 2x-14=x+15

how to solve: add 14 to both side, and subtract x from both sides. The equation will then be x=29.

I might be wrong tho.

Margarita [4]2 years ago

3 0

Answer:

Step-by-step explanation:

2x - 14 = x + 15

2x - x = 15 + 14

x = 29

check

44 = 44

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If we wanted to create a new 90% confidence interval from a different sample for the proportion of those with a two on one date

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Step-by-step explanation:

The formula we use to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

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If prior estimation of the proportion is unknown, then we take p= 0.5 , the formula becomes

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2$

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$z_{\alpha/2}=1.645$

Then, the required sample size would be :

$n=0.25(\dfrac{1.645}{0.05})^2$

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3 years ago

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