All categories

3 years ago

Can someone please help me with ALL 5 QUESTIONS? You will receive 20 points and brainliest if you do so.

Mathematics

2 answers:

strojnjashka [21]3 years ago

6 0

So question one I have B , question 2 is C, question 3 is B

IrinaVladis [17]3 years ago

4 0

I believe the first one would be b, secound c, and third b i believe

You might be interested in

A recent survey of students at John Tukey High School revealed that

RoseWind [281]

Answer:

0.5234 = 52.34% probability that at least three of these students are in favor of the proposal to change the dress code.

Step-by-step explanation:

For each student, there are only two possible outcomes. Either they are in favor, or they are not. Students are independent. This means that 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.

18% of the students are in favor of changing the dress code.

This means that $p = 0.18$

You randomly select 15 students

This means that $n = 15$

What is the probability that at least three of these students are in favor of the proposal to change the dress code?

This is

$P(X \geq 3) = 1 - P(X < 3)$

In which

$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)$

In which

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

$P(X = 0) = C_{15,0}.(0.18)^{0}.(0.82)^{15} = 0.051$

$P(X = 1) = C_{15,1}.(0.18)^{1}.(0.82)^{14} = 0.1678$

$P(X = 2) = C_{15,2}.(0.18)^{2}.(0.82)^{13} = 0.2578$

$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2) = 0.051 + 0.1678 + 0.2578 = 0.4766$

$P(X \geq 3) = 1 - P(X < 3) = 1 - 0.4766 = 0.5234$

0.5234 = 52.34% probability that at least three of these students are in favor of the proposal to change the dress code.

8 0

3 years ago

Your dog is 16 years old in dog years. Your cat is 28 years old in cat years. For every human year, your dog ages by 7 dog years

Ber [7]

I see this as the difference in their current years is 12, and the difference between the number of years they both age in human years is 3, so after 4 human years they become the same age.

6 0

4 years ago

Please Help! A new dirt bike valued at $9000 loses 18% of its value each year. What is the initial price of the dirt bike? I don

Lelechka [254]

Answer:

The new dirt bike should cost $9000

7 0

3 years ago

The design pattern on a blanket has 3 circles followed by 4 triangles. this pattern repeats across the entire blanket. move a nu

maxonik [38]

The ratio between the circle and triangle is described as 3:4.

<h3>What is ratio?</h3>

An ordered pair of numbers a and b, written as a / b, is a ratio if b is not equal to 0.

A proportion is an equation that sets two ratios at the same value.
In this section, the terms ratio and proportion are defined. Both ideas play a significant role in mathematics. Numerous examples where the concept of the ratio is highlighted may be found in daily life, such as the rate of speed (distance/time) or price (rupees/meter) of a substance.
An equation for proportion establishes the equality of the two provided ratios.
Only when the two numbers in a ratio have the same unit can they be compared. Ratios are used to compare two objects. A ratio is indicated by the symbol
A fraction, like 2/5, can be used to represent a ratio. In our daily lives, we come across many comparisons, or ratios.
As a result, the ratio can be expressed in three distinct ways, including:

a to b
a : b
a/b

Know more about ratio and proportion numerical

brainly.com/question/12024093

#SPJ4

5 0

2 years ago

an object that weighs 1 pound on earth weighs 1.19 pounds on neptune suppose a dog weighs 9 pounds on earth how much would the s

grigory [225]

9x1.19=10.71

This means the dog weighs 10.71 pounds, hope this helps

8 0

2 years ago