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2 years ago

27. The square of a number is 8 more than 420 minus 347. What is thenumber?

Mathematics

1 answer:

Stells [14]2 years ago

8 0

Answer:

x=9 or -9

Step-by-step explanation:

the equation is:x^2-8=420-347

420-347=73

if x=9 then 81-8=73

and then 73=73

so x=9

hope this helps!

please mark my answer as brainliest! thanks! :)

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Allisa [31]

Answer: Option 'c' is correct.

Step-by-step explanation:

Since we have given that

n = 1200

x = 32% of 1200

So, $\hat{p}=32\5=0.32$

We need to find 95% confidence interval.

so, z = 1.96

So, margin of error would be

$z\times \sqrt{\dfrac{p(1-p)}{n}}\\\\=1.96\times \sqrt{\dfrac{0.32\times 0.68}{1200}}\\\\=1.96\times 0.0135=$

So, Interval would be

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2 years ago

27. The square of a number is 8 more than 420 minus 347. What is thenumber?​

27. The square of a number is 8 more than 420 minus 347. What is thenumber?