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Maurinko [17]
3 years ago
15

If a is a constant such that 9x^2 + 24x + a is the square of a binomial, then what is a?

Mathematics
1 answer:
siniylev [52]3 years ago
4 0

Answer: 16

Step-by-step explanation:

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You measure 22 textbooks' weights, and find they have a mean weight of 64 ounces. Assume the population standard deviation is 5.
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Answer:

Step-by-step explanation:

We want to determine a 90% confidence interval for the true population mean textbook weight.

Number of sample, n = 22

Mean, u = 64 ounces

Standard deviation, s = 5.1 ounces

For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

It becomes

64 ± 1.645 × 5.1/√22

= 64 ± 1.645 × 1.087

= 64 ± 1.788

The lower end of the confidence interval is 64 - 1.788 = 62.21 ounces

The upper end of the confidence interval is 64 + 1.788 = 65.79 ounces

Therefore, with 90% confidence interval, the true population mean textbook weight is between 62.21 ounces and 65.79 ounces

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Answer:

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Step-by-step explanation:

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3 years ago
3x(5-2)=(3x5)-(3x2) explain how you could use the distributive property and mental math to find 5x198
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What's the value of (-8)(2/3)
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Answer:

-5.3

Step-by-step explanation:

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