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3 years ago

If f(x)=2x-5, find a. f(4) b. f(-3)

Mathematics

1 answer:

Vladimir [108]3 years ago

8 0

Replace x in the given equation with each value:

a. f(4) = 2(4) -5

= 8-5

b. (f-3) = 2(-3) - 5

= -6 -5

= -11

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Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the length of time waiting to be seated of a population, and for this case we know the distribution for X is given by:

$X \sim N(19,4.0)$