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MrMuchimi
3 years ago
9

Add or subtract (5x^2-4x-1)-(-4x^2-4)

Mathematics
1 answer:
kifflom [539]3 years ago
6 0

Answer:

5x^2 - 4x - 1 + 4x^2 + 4

9x^2 - 4x + 3

Step-by-step explanation:

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Area of the square:
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Weatherwise magazine is published in association with the American Meteorological Society. Volume 46, Number 6 has a rating syst
lisabon 2012 [21]

Answer:

a)  c) μ = 16.4.

b)  d) μ > 16.4.

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d) c) μ ≠ 16.4.

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Step-by-step explanation:

Question a:

Test if it is getting worse, so at the alternative hypothesis we test if the mean is of greater than 16.4 inches, but at the null hypothesis we test if it is still of 16.4 options, so option C.

Question b:

At the alternative hypothesis we test if the mean is of greater than 16.4 inches, as said above, so the answer is given by option d.

Question c:

Dying down, so if the mean is lower than 16.4 inches, so option a.

Question d:

Don't know, so just test if it is different, which includes both lower or greater, so the correct answer is given by option c.

Question e:

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Test if less -> left, so on question c) is a left tailed test.

Different -> both sides, so on question d) it is a two-tailed test.

Thus the correct answer is given by option d.

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The answer is the first choice

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