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3 years ago

Given f(x)=2x2-3, find F(-3)

2 answers:

8 0

Well, evaluating a function means plugging whatever they gave me in for the argument in the formula. This means that I have to plug this character "§" in for every instance of x. Here goes:

f (§) = (§)2 + 2(§) – 1

= §2 + 2§ – 1

This is definitely weird-looking, but it follows all the rules they gave me, so:

f (§) = §2 + 2§ – 1

Plz mark as Brainliest

Paraphin [41]3 years ago

3 0

Answer:

f(-3) = 15

Step-by-step explanation:

f(x)= 2x^2 - 3

Plug in x = -3 into the function

f(-3) = 2(-3)^2 - 3

f(-3) = 18 - 3

f(-3) = 15

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3) The third graph is the graph of f(x) traslated 5 units downward, then the equation of this graph is: y=x^2-5

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If a sample of 14 students were taken from a population of 168 students, could refer to the variance of how many of the students

tensa zangetsu [6.8K]

⇒The Variance tells us spread between each variate in data set from mean.

Now, Coming to the Question

⇒Sample of 14 students were taken from a population of 168 students.

Variance =Expected value of square of each variate taken from mean, which can be represented as

$=\sum_{N=1}^{k} \frac{E(x-\mu)^2}{N}$

Size of Sample taken in terms of Percentage

$=\frac{14}{168} \times 100\\\\=\frac{100}{12}\\\\=8.\bar{3}$

⇒Sample Size is Approximately only 8.4% of total Population,which is very small, that can't represent the whole Population Variance.

Option B:→ 14 , is most appropriate, which Represents the Variance of 14 student height.

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ICE Princess25 [194]

Answer:

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Step-by-step explanation:

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