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Tju [1.3M]
3 years ago
12

Evaluate the following expression. 8to the power of 3 − 9 ⋅ 2 ÷ 3 = ?

Mathematics
1 answer:
ahrayia [7]3 years ago
3 0

Answer:

8^-3  I think  (i'm too lazy to simplify)

Step-by-step explanation:

3 - 9 * 2 ÷ 3 = ?

3 - 18 ÷ 3 = ?

3 - 6 = -3

8 to the power of -3

hmmmm i dont think im right tell me if im not

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Answer:

20 : 9

Step-by-step explanation:

Given the ratio

2 : \frac{9}{10}

Multiply both parts of the ratio by 10 to clear the fraction

= 20 : 9

6 0
3 years ago
You have large,medium, and small books in the ratio of 7:6:3 and you have a total of 32 books how many small books do you have
igor_vitrenko [27]

6 is the amount you have

6 0
3 years ago
Each multiple-choice question on an exam has four choices. Suppose that there are 10 questions and the choice is selected random
Anika [276]

Answer:

It is discrete, but not uniform, since each outcome is not equally as likely.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either it is answered correctly, or it is not. The probability of answered a question is independent from the probability of answeing other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

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.

Each multiple-choice question on an exam has four choices.

This means that p = \frac{1}{4} = 0.25

10 questions

This means that n = 10

Let X denote the number of questions answered correctly. Does X have a discrete uniform distribution? Why or why not?

It is discrete, because the number of questions answered correctly is a discrete value.

However, it is not uniform. A distribution is uniform when each outcome is equally as likely. For example, the probability of answering 0 questions correctly is different of the probability of answering 1 question correctly, as we see below.

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

P(X = 0) = C_{10,0}.(0.25)^{0}.(0.75)^{10} = 0.0563

P(X = 1) = C_{10,1}.(0.25)^{1}.(0.75)^{9} = 0.1877

3 0
3 years ago
What is the standard form of the equation of a parabola that opens left or
lisov135 [29]

Answer:

A

Step-by-step explanation:

If the parabola opens left or right (is a horizontal parabola) then our formula needs to have an " y²" in it.

so it must be choice A

x= a(y-v)² + h

7 0
2 years ago
Please help I will give me with the answerrrrrrrr
WINSTONCH [101]

Answer:

subtract 2 of each side then devide by 3 , the correct answer is C

3 0
2 years ago
Read 2 more answers
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