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iren2701 [21]
3 years ago
6

What is the range of the function f(x) = 3x^2 - 2?

Mathematics
2 answers:
sergeinik [125]3 years ago
8 0

Answer:

[-2, infinity)

Step-by-step explanation:

The range of x^2 is [0, infinity).

The range of 3x^2 is the same as above.

The range of 3x^2 - 2 is [-2, infinity).

lidiya [134]3 years ago
6 0

Answer:

[-2,positive infinity)

{y|y\geq-2}

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F(x)=3x+5 over x , what is f(a+2)
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<u>Answer</u>

F(a+2) = (3a+11)/(a+2)


<u>Explanation</u>

F(x) = (3x + 5)/x


If you are to find F(a+2), you replace x with (a+2)


F(a+2) = (3(a+2)+5))/(a+2)

= (3a+6+5)/(a+2)

=(3a+11)/(a+2)

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What is the median of the data set? {17, 40, 23, 44, 44, 30} Enter your answer in the box.
beks73 [17]
To find the median of the data set, we must first order them from lowest to highest in increasing order. Let's rearrange them in that way:

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Then we begin by crossing one off from each side, until we get to the middle. However, we see that our middle here is both 30 and 40.

What we do in a case like this is add up the two numbers and divide by 2 (essentially find the mean of the two middlemost numbers). Let's do that now:

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8 0
4 years ago
An exit poll of 1000 randomly selected voters found that 515 favored measure A. a. Construct a 99% confidence interval for the s
never [62]

Answer:

Step-by-step explanation:

Given that an  exit poll of 1000 randomly selected voters found that 515 favored measure A.

Sample proportion p = \frac{515}{1000} =0.515

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99% confidence interval =(0.515-0.0408, 0.515+0.0408)\\= (0.474, 0.556)

------------------------

H_0: p =0.5\\H_a: p >0.5\\

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