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3 years ago

WILL MARL BRAINLIEST IF YOU HELP

Mathematics

1 answer:

lana66690 [7]3 years ago

7 0

Answer:

Step-by-step explanation:

In a triangle, the sum of the lengths of any two sides must be greater than the length of the third side.

9 + 9 = 18

18 < 22

No triangle

7 + 3 = 10

10 = 10

No triangle

5 + 6 = 11 and 11 > 9 good

5 + 9 = 14 and 14 > 6 good

9 + 6 = 15 and 15 > 5 good

There is a triangle.

Answer: C.

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Step-by-step explanation:

maybe not but i think this is it

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Question 2 In the fall, a community service club sold 10 shirts and 20 hats for a total of $490. In the spring, the club sold 20

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To answer the question above, we let s be the cost of a shirt and h be the cost of each hat such that the equations that would best represent the given are:
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4 years ago

How to algebraically find the limit of a function as x approaches infinity?

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4 years ago

"In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-

creativ13 [48]

Answer:

For this case we want to find this probability:

$P(10$

And we can use the z score formula to see how many deviation we are within the mean and we got:

$z = \frac{10-37}{9}=-3$

$z = \frac{64-37}{9}=3$

And for this case we know that within 3 deviation from the mean we have 99.7% of the values and that's the answer for this case.

Step-by-step explanation:

Previous concepts

The empirical rule, also known as three-sigma rule or 68-95-99.7 rule, "is a statistical rule which states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ)".

Let X the random variable who represent the number of phone calls answered.

From the problem we have the mean and the standard deviation for the random variable X. $E(X)=37, Sd(X)=9$

So we can assume $\mu=37 , \sigma=9$

On this case in order to check if the random variable X follows a normal distribution we can use the empirical rule that states the following:

• The probability of obtain values within one deviation from the mean is 0.68

• The probability of obtain values within two deviation's from the mean is 0.95

• The probability of obtain values within three deviation's from the mean is 0.997

Solution to the problem

For this case we want to find this probability:

$P(10$

And we can use the z score formula to see how many deviation we are within the mean and we got:

$z = \frac{10-37}{9}=-3$

$z = \frac{64-37}{9}=3$

And for this case we know that within 3 deviation from the mean we have 99.7% of the values and that's the answer for this case.

3 0

3 years ago