2 years ago

Find the GCF of -10c2d and 15cd2.

Mathematics

1 answer:

MAXImum [283]2 years ago

5 0

Answer:

-5cd

Step-by-step explanation:

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Find the value(s) of "k" that will cause the equation 4x^2 +kx + 4 to have one real solution.

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Answer: k = {8, -8}

<u>Step-by-step explanation:</u>

In order for a quadratic equation to have exactly one solution, the discriminant must equal zero. → b² - 4ac = 0

4x² + kx + 4 = 0

↓ ↓ ↓

a=4 b=k c=4

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3 years ago

A researcher is interested in estimating the mean weight of a semi tracker truck to determine the potential load capacity. She t

FinnZ [79.3K]

Answer:

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Step-by-step explanation:

We are given the following information:

Sample size, n = 17

Sample mean = 20,000 pounds

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Significance level = 5% = 0.05

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 16 and}~\alpha_{0.05} = \pm 2.119$

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