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2 years ago

Please help me with these two problems I need help

Mathematics

1 answer:

sweet [91]2 years ago

7 0

Answer:

24 area

18.80983669 perimeter

Step-by-step explanation:

1 (6*3/2)*2(1*3/2)+(4*3)

2 trust me

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Rodrigo practiced playing the guitar for 15 1/3 hours over the past 3 weeks. He practiced for 6 1/4 hours during the first week

Luda [366]

15 1/3 - 6 1/4 - 4 2/3 = <span>4.41666666667 hours</span>

4 0

3 years ago

the name Joe is very common at a school in one out of every ten students go by the name. If there are 15 students in one class,

kumpel [21]

Using the binomial distribution, it is found that there is a 0.7941 = 79.41% probability that at least one of them is named Joe.

For each student, there are only two possible outcomes, either they are named Joe, or they are not. The probability of a student being named Joe is independent of any other student, hence, the <em>binomial distribution</em> is used to solve this question.

<h3>Binomial probability distribution </h3>

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

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

The parameters are:

x is the number of successes.

n is the number of trials.

p is the probability of a success on a single trial.

In this problem:

One in ten students are named Joe, hence $p = \frac{1}{10} = 0.1$ .

There are 15 students in the class, hence $n = 15$ .

The probability that at least one of them is named Joe is:

$P(X \geq 1) = 1 - P(X = 0)$

In which:

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

$P(X = 0) = C_{15,0}.(0.1)^{0}.(0.9)^{15} = 0.2059$

Then:

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.2059 = 0.7941$

0.7941 = 79.41% probability that at least one of them is named Joe.

To learn more about the binomial distribution, you can take a look at brainly.com/question/24863377

8 0

2 years ago

Which two fractions name point R on the number line?

3241004551 [841]

Answer:

The answer is D.) 6/8 and 3/4

Step-by-step explanation:

If you count how many lines there are you get 8 lines so we know the denominator has to be eight and since the point is on the 6th line the first one is 6/8 and since you can simplify it you get 3/4 which gives you D.)

Hope I helped

A brainliest is always appreciated

4 0

2 years ago

What is the benefit of converting measures in a ratio to the same unit

RoseWind [281]

Answer:

so you can simplify the ratio

Step-by-step explanation:

5 0

3 years ago

Which other expression has the same value as (-14)-(-8)

sergiy2304 [10]

Answer:

(-14)+(-8)

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers