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alexgriva [62]
2 years ago
6

This is khan academy and i need it fast thx

Mathematics
1 answer:
11111nata11111 [884]2 years ago
4 0

Answer:

C

Step-by-step explanation:

The angles are supplementary because all the angles add up to 180 and they form a straight line together.

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The owner of a small deli is trying to decide whether to discontinue selling magazines. He suspects that only 10% of his custome
Rainbow [258]

Answer:

0.55% probability that exactly 5 out of the first 13 customers buy a magazine

Step-by-step explanation:

For each customer, there are only two possible outcomes. Either they buy a magazine, or they do not. The probability of a customer buying a magazine is independent of other customers. 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.

10% of his customers buy a magazine

This means that P = 0.1

What is the probability that exactly 5 out of the first 13 customers buy a magazine?

This is P(X = 5) when n = 13. So

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

P(X = 5) = C_{13,5}.(0.1)^{5}.(0.9)^{8} = 0.0055

0.55% probability that exactly 5 out of the first 13 customers buy a magazine

3 0
3 years ago
Read 2 more answers
Answer 173.22÷4 and use long division to show work.
olga nikolaevna [1]
43.305 Hope this helps. 
8 0
3 years ago
Read 2 more answers
Question 6<br> What is the slope of the line whose equation is<br> 2y = 3x + 4?
ludmilkaskok [199]

Answer:

3/2 or 1.5

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
How many centimeters are there in 1 foot? There are 12 inches in 1 foot. the ratio of centimeters to inches by the number of inc
Darya [45]

Answer:

There are 0.0328 centimeters in 1 foot.

Step-by-step explanation:

Given : There are 12 inches in 1 foot.

To find : How many centimeters are there in 1 foot?

Solution :

1 foot = 12 inches

and 1 inch = 2.54 centimeter

So, 12 inches = 12\times 2.54 centimeter

12 inches = 30.48 centimeter

i.e. 1 foot = 30.48 centimeter

Then, 1 centimeter = \frac{1}{30.48} foot

1 centimeter = 0.0328 foot

Therefore, there are 0.0328 centimeters in 1 foot.

8 0
3 years ago
Read 2 more answers
8k=4/9 what is the answer
ki77a [65]
8k = 4/9

Divide 8 to both sides, or multiply by its reciprocal 1/8:

k = 4/9 * 1/8

k = 4/72

k = 1/18
5 0
3 years ago
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