Find the y-intercept of the following equation.

Mathematics

1 answer:

Dafna1 [17]4 years ago

6 0

Answer:

(0,12)

Step-by-step explanation:

y = -3x^2 – 4x + 12

To find the y intercept, let x=0

y = -3(0) -4(0) +12

y=12

The y intercept is (0,12)

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Decide whether the relation is a function?

Nana76 [90]

Answer:

A property of a function is that it gives one output for an input

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here, we can see that we have 2 outputs for the input '6'. therefore, it is NOT a function

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3 years ago

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Lesechka [4]

Answer:

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Step-by-step explanation:

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Weights of American adults are normally distributed with a mean of 180 pounds and a standard deviation of 8 pounds. What is the

ahrayia [7]

Answer:

15.87% probability that a randomly selected individual will be between 185 and 190 pounds

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 180, \sigma = 8$