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Naya [18.7K]
3 years ago
13

Evaluate the expression using the given value of the variable. 4 – 2x + 5x when x = 4 16 –24 –18 28

Mathematics
1 answer:
Snowcat [4.5K]3 years ago
3 0

Answer:

A) 16

Step-by-step explanation:

The question is:

Evaluate the expression using the given value of the variable.

4-2x+5x  when x = 4

A) 16

B) -24

C) -18

D) 28

Solution:

Given expression:

4-2x +5x

Plugging in x = 4 in the expression

⇒ 4-2(4)+5(4)

⇒ 4-8+20

⇒ 16

So the expression evaluates to 16 when we put x = 4

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FinnZ [79.3K]

Answer:

a)Both X and Y can be well approximated by normal random variables.

Step-by-step explanation:

For each individual, there are only two possible outcomes. Either they are right-handed, or they are left-handed. This means that we can solve this problem using concepts of the binomial probability distribution.

Binomial probability:

Probability of exactly x sucesses on n repeated trials, with probability p.

The binomial probability can be well approximated by normal random variables, using the expected value E(X) = np and the standard deviation \sigma = \sqrt{np(1-p)}

Let X be the number of males (out of the 100) who are left-handed.

n = 100 and p = 0.13. Can be well approximated.

Let Y be the number of females (out of the 80) who are left-handed.

n = 80 and p = 0.11. Can be well approximated.

The correct answer is

a)Both X and Y can be well approximated by normal random variables.

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vovikov84 [41]

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

1 : 50

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