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3 years ago

Kenji buys 3 yards of fabric for $7.47 then he realizes that he needs 2 more yards how much will the extra fabric cost

Mathematics

1 answer:

Norma-Jean [14]3 years ago

8 0

You would have to divide 7.47 with 3 which would get you 2.49..you would double that and your answer would be 4.98.

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What is the focus of the parabola? y=−14x2−2x−2

nataly862011 [7]

First, we need to transform the equation into its standard form (x - h)²=4p(y - k).
Using completing the square method:

y = -14x² - 2x - 2
y = -14(x² + 2x/14) - 2
y = -14(x² + 2x/14 + (2/28)²) -2 + (2/28)²
y = -14(x + 1/14)² - 391/196
-1/14(y + 391/196) = (x + 1/14)²

This is a vertical parabola and its focus (h, k + p) is (-1/14, -391/196 + 1/56) = (-1/14, -775/392).

Or (-0.071,-1.977).

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krok68 [10]

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Step-by-step explanation:

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322. So this is correct or wrong

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Find the four arthmetic means between -3 and 46

Citrus2011 [14]

Answer:

6.8, 16.6, 26.4, 36.2

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d = 49/5 = 9.8

So the first arithmetic mean is -3 + 9.8 = 6.8. and the second is -3 + 2(9.8) = 16.6...

They are:

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Using confidence interval concepts, it is found that the incorrect statement is given by:

B. The population proportion is 0.80.

In a sample of n people with a proportion of $\pi$ , and a confidence level of $1-\alpha$ , we the confidence interval for the proportion is:

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

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$\pi = \frac{80}{100} = 0.8$

Option A is correct.

The standard error is:

$s = \sqrt{\frac{\pi(1-\pi)}{n}}$

Considering $n = 100$

$s = \sqrt{\frac{0.8(0.2)}{100}} = 0.04$

Thus, statement E is correct.

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$M = zs = 1.645(0.04) = 0.0658$

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A similar problem is gien at brainly.com/question/16807970

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