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babunello [35]
3 years ago
10

Solve 6x^2+1=20 Round to the nearest hundredth

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
8 0

Answer: I know you probably got the answer, but for anyone else who needs it, it's -1.78 and 1.78. I just took the quiz, so. :u

Step-by-step explanation:

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there are 342 seats in the Jefferson middle school auditorium. There are 75 seats being used by teachers. Students are using 2/3
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Answer:

267 i think. I might have counted wrong



8 0
2 years ago
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What is the probability a sample of 90 test takers will provide a sample mean test score within 10 points of the population mean
Elena-2011 [213]

Answer:

0.658 is the probability that a sample 90 test takers will provide a sample mean test score within 10 points of the population mean of 502.

Step-by-step explanation:

The following information is missing:

The standard deviation of population is 100.

We are given the following information in the question:

Population mean, μ = 502

Standard Deviation, σ = 100

Sample size, n  = 90

Standard error =

\dfrac{\sigma}{\sqrt{n}} = \dfrac{100}{\sqrt{90}} =  10.54

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

P(test score within 10 points)

P(492 \leq x \leq 512) \\\\= P(\displaystyle\frac{492 - 502}{10.54} \leq z \leq \displaystyle\frac{512-502}{10.54}) \\\\= P(-0.9487 \leq z \leq 0.9487)\\= P(z \leq 0.9487) - P(z < -0.9487)\\= 0.829 -0.171 = 0.658 = 65.8\%

P(492 \leq x \leq 512) = 65.8\%

0.658 is the probability that a sample 90 test takers will provide a sample mean test score within 10 points of the population mean of 502.

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2 years ago
The Inconsistent Books store changes the normal prices of books on Mondays and Tuesdays. On Monday the price of a book is 10% ab
olganol [36]
13.365 would be the price of that book on tuesday.
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If a train traveld from station A at 60 mph in direction of station B, which is 60 miles away, how long would it take the train
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Answer:

b

Step-by-step explanation:because

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