2 years ago

it is a polynomial equation of degree two that can be written in tche form, where a,b, and c are real numbers and a =/

1 answer:

6 0

Answer:

A quadratic function is a second degree polynomial function. The general form of a quadratic function is this: f (x) = ax2 + bx + c, where a, b, and c are real numbers, and a≠ 0.

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In a random sample of fivefive microwave ovens, the mean repair cost was $75.0075.00 and the standard deviation was $13.0013.

Radda [10]

<h2>Answer with explanation:</h2>

As per given , we have

Sample size : n= 5

Degree pf freedom = : df= 5-1=4

$\mu=\$75.00$

$\sigma=\$13.00$

Significance level for 90% confidence = $\alpha=1-0.90=0.1$

Using t-value table , t-critical value for 90% confidence:

$t_{\alpha/2, df}=t_{0.05, 4}=2.132.$

Margin of error of $\mu$ : $E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\(2.132)\dfrac{13}{\sqrt{5}}=12.3949720129\approx12.39$

Interpretation : The repair cost will be within $12.39 of the real population mean value $\mu$ 90% of the time.

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3 years ago

<img src="https://tex.z-dn.net/?f=5%20%5Cdiv%202%20%5Csqrt%7B2%7D%20" id="TexFormula1" title="5 \div 2 \sqrt{2} " alt="5 \div 2

Rufina [12.5K]

$\dfrac{5}{2 \sqrt{2} }$

it's the only ans then possible ! ^•,,,•^

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2 years ago

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HELP PLS I'LL MARK U BRAINLIST !!

Dahasolnce [82]

Answer:

angles in a triangle add up to 180°

5:12:13 = 30

180 ÷ 30 = 6

6 × 5 = 30°

6 × 12 = 72°

6 × 13 = 78°

angles = 30°, 72°, 78°

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2 years ago

I need help with this 7f + 2f - 3b + b I can't figure it out

Leni [432]

Answer:

9f-4b

Step-by-step explanation:

you add the two fs together and you add the two bs together to get the answer

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3 years ago

a machine can produce 6 yards of fabric in 2 minutes. how much fabric can the machine produce in 1 hour

GaryK [48]

Multiply 6 by 60 then divide by two which will get you 180.

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3 years ago

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