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MAXImum [283]
3 years ago
5

Please help me with math

Mathematics
1 answer:
Scilla [17]3 years ago
7 0

Answer:

Hope this helps

Step-by-step explanation:

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An employment agency specializing in temporary construction help pays heavy equipment operators $131 per day and general laborer
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19 heavy equipment operators and 20 general laborers
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3 years ago
Look at the subtraction expression below.
nadezda [96]

Answer:

A

Step-by-step explanation:

I took the quiz

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2 years ago
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Which statement is not true for a binomial distribution with n = 15 and p = 1/20 ? a) The standard deviation is 0.8441 b) The nu
malfutka [58]

Answer:

d) The highest probability occurs when x equals 0.7500

Step-by-step explanation:

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability, given by the following formula:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

In this problem, we have that:

n = 15, p = \frac{1}{20}

a) The standard deviation is 0.8441

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{15*0.05*0.95} = 0.8441

This is correct

b) The number of trials is equal to 15

n is the number of trials and n = 15. So this option is correct.

c) The probability that x equals 1 is 0.3658

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 1) = C_{15,1}.(0.05)^{1}.(0.95)^{14} = 0.3658

This option is correct.

d) The highest probability occurs when x equals 0.7500

False. The number of sucesses is a discrete number, that is, 0, 1, 2,...,15. P(X = 0.75), for example, does not exist.

e) The mean equals 0.7500

E(X) = np = 15*0.05 = 0.75

This option is correct.

f) None of the above

d is false

3 0
3 years ago
Match the written mathematical operation to the equivalent symbolic form.
ki77a [65]

Answer:

the product of 2 and 9 — 3rd choice

the difference of 2 and 9 — 2nd choice

the square of 9 — 1st choice

the sum of 2 and 9 — 5th choice

the quotient of 2 and 9 — 4th choice

Step-by-step explanation:

5 0
3 years ago
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How many solutions are there to the equation below?
xxMikexx [17]

Hi there! :)

Answer:

B. 0 solutions.

Step-by-step explanation:

Given the equation 7(x + 2) = 7x - 10

Simplify:

7(x + 2) = 7x - 10

Distribute the 7 with the terms inside of the parenthesis:

7x + 14 = 7x - 10

Subtract "7x" and 14 from both sides:

7x - 7x = -10 - 14

0 ≠ - 24. The equation has no solutions.

5 0
3 years ago
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