PRECISION Should you use an open circle or a closed circle in the graph of

Mathematics

1 answer:

Ksenya-84 [330]3 years ago

5 0

Answer:

When graphing a linear inequality on a number line, use an open circle for "less than" or "greater than", and a closed circle for "less than or equal to" or "greater than or equal to". To CHECK an inequaltiy, it is not possible to test every value.

Step-by-step explanation:

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Solve 5x4/9. help pleeeeaaassee

Rus_ich [418]

Answer:

$\sf \: 2 \frac{2}{9}$

Step-by-step explanation:

Q) 5 × (4/9) = ?

→ (5 × 4)/9

→ 20/9

$\rightarrow\sf \: 2 \frac{2}{9}$

8 0

3 years ago

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Y = -2(x + 5)(x + 1)<br> Set the factor (x + 5) = 0 and solve

Harrizon [31]

Answer: $x=-5$

Step-by-step explanation:

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2 years ago

Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and th

blondinia [14]

Answer:

0.7823 = 78.23% probability that the response time is between 3 and 9 minutes.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Normal distribution with a mean of 7.2 minutes and a standard deviation of 2.1 minutes.

This means that $\mu = 7.2, \sigma = 2.1$