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3 years ago

Operations definition please

Mathematics

2 answers:

ad-work [718]3 years ago

8 0

The action of being active

maksim [4K]3 years ago

3 0

The factor or condition of functioning or being active.
Hope I helped!

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It was reported that 23% of U.S. adult cellphone owners called a friend for advice about a purchase while in a store. If a sampl

leva [86]

Answer:

$P(X=7)$

And using the probability mass function we got:

$P(X=7)=(15C7)(0.23)^7 (1-0.23)^{15-7}=0.0271$

Step-by-step explanation:

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=15, p=0.23)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

And we want to find the following probability:

$P(X=7)$

And using the probability mass function we got:

$P(X=7)=(15C7)(0.23)^7 (1-0.23)^{15-7}=0.0271$

5 0

2 years ago

A plumber charges $70 per hour plus $40 for the call what does he charge for 4 hours of work

docker41 [41]

First do $70(4). That would equal $280. Then do $280+$40=$320

6 0

3 years ago

Triangle ABC has been reflected over the x-axis to create triangle A'B'C'. Which of the following statements is true?

Leto [7]

Answer:

A ' = (-2, -3)

B ' = (0, -3)

C ' = (-1, 1)

=======================================================

Explanation:

To apply an x axis reflection, we simply change the sign of the y coordinate from positive to negative, or vice versa. The x coordinate stays as is.

Algebraically, the reflection rule used can be written as

Applying this rule to the three given points will mean....

Point A = (-2, 3) becomes A ' = (-2, -3)

Point B = (0, 3) becomes B ' = (0, -3)

Point C = (-1, -1) becomes C ' = (-1, 1)

The diagram is provided below.

Side note: Any points on the x axis will stay where they are. That isn't the case here, but its for any future problem where it may come up. This only applies to x axis reflections.

Step-by-step explanation:

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2 years ago

Express the ratio as a fraction in the lowest term.500m:1km

snow_lady [41]

Step-by-step explanation:

500:1000

500/500:1000/500(both divided by 500-

1:2

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2 years ago

Line segment MN has endpoints M(4,-5) and N(-3,1). Find MN.

pshichka [43]

9.2195444572928873100022742817628. or square root of 85

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2 years ago