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iVinArrow [24]
2 years ago
14

Will mark brainliest for whoever answers correctly

Mathematics
1 answer:
siniylev [52]2 years ago
6 0
I think it is D:{5,-infinity}
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What does -2(-5x+9)-9x equal
Ann [662]
-2(-5x+9)-9x
-2(-5x)+-2(9)-9x
10x-18-9x
+9        +9
19x=-18
----    ----
19     19
x=-1.05
7 0
3 years ago
Select the most accurate statement regarding the normal distribution. Group of answer choices It is always the appropriate distr
PSYCHO15rus [73]

Answer:

There is a 95% chance that values will be within ±2 standard deviations of the mean.

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.

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this question:

According to the empirical rule, 95% of the measures are within 2 standard deviations of the mean. So the correct statement is:

There is a 95% chance that values will be within ±2 standard deviations of the mean.

4 0
3 years ago
How much cash did the person who filled out this deposit slip receive? a. $381.23 b. $451.02 c. $88.79 d. $436.02
telo118 [61]

Answer:

c

Step-by-step explanation:

its c

7 0
3 years ago
Read 2 more answers
What is the area of the triangle?
kipiarov [429]

Step-by-step explanation:

A

=

15

I hope this is correct

3 0
2 years ago
Find the value of x. round the length to the nearest tenth
Ronch [10]

Answer:

777.9 meters

Step-by-step explanation:

Notice that the angles of the right triangle are 40 and 50 degrees, with the 500 meter side adjacent to the 50 degree angle. Now, we can set up an equation: cos (50 degrees) = 500 / x. Use a calculator to find that the answer is 777.9.

3 0
3 years ago
Read 2 more answers
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