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3 years ago

Need help please and thank

Mathematics

1 answer:

cupoosta [38]3 years ago

7 0

Answer:

The Answer is B

Step-by-step explanation:

All the numbers and coefficients in option B correspond with the ones in the question. Hope this helps :)

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Ebony walked at a rate of 3 1/2 miles per hour for 1 1/3 hours. how far did she walk.

Pachacha [2.7K]

About 4.65 miles. Multiply 3 1/2 (3.5) by 1 1/3 (1.33) and thats how you get the answer

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3 years ago

How I can answer this question, NO LINKS, if you answer correctly I will give u brainliest!

tino4ka555 [31]

Answer:

6.73E-8 I think

Step-by-step explanation:

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2 years ago

Read 2 more answers

I need help on this

german

Answer:

No they or not

Step-by-step explanation:

The first on is 60 and the second one is 40

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3 years ago

A multiple-choice examination has 20 questions, each with five possible answers, only one of which is correct. Suppose that one

kari74 [83]

Answer:

The probability that the student answers at least seventeen questions correctly is $8.03\times 10^{-10}$ .

Step-by-step explanation:

Let the random variable X represent the number of correctly answered questions.

It is provided all the questions have five options with only one correct option.

Then the probability of selecting the correct option is,

$P(X)=p=\frac{1}{5}=0.20$

There are n = 20 question in the exam.

It is also provided that a student taking the examination answers each of the questions with an independent random guess.

Then the random variable can be modeled by the Binomial distribution with parameters n = 20 and p = 0.20.

The probability mass function of X is:

$P(X=x)={20\choose x}\ 0.20^{x}\ (1-0.20)^{20-x};\ x =0,1,2,3...$

Compute the probability that the student answers at least seventeen questions correctly as follows:

$P(X\geq 17)=P (X=17)+P (X=18)+P (X=19)+P (X=20)$

$=\sum\limits^{20}_{x=17}{{20\choose x}\ 0.20^{x}\ (1-0.20)^{20-x}}\\\\=0.00000000077+0.000000000032+0.00000000000084+0.000000000000042\\\\=0.000000000802882\\\\=8.03\times10^{-10}$

Thus, the probability that the student answers at least seventeen questions correctly is $8.03\times 10^{-10}$ .

4 0

3 years ago

Three more than the quotient of a number and 6 is 8.

meriva

Answer:

x/6 + 3 = 8

x/6 = 5

x = 30

Step-by-step explanation:

6 0

3 years ago

Need help please and thank ​

Need help please and thank