Please help with questions 1 and 3! BRAINLIEST to correct answer!!!

Holly earned 800 more than she did last year what integer what represents this scenario?

Colt1911 [192]

Answer:

Step-by-step explanation:

I am sorry but please give detailed question

8 0

3 years ago

About 19% of the population of a large country is hopelessly romantic. If two people are randomly selected, what is the probab

Aleksandr-060686 [28]

Answer:

3.61% probability that both are hopelessly romantic.

34.39% probability at least one is hopelessly romantic

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they are hopelessly romantic, or they are not. The probability of a person being hopelessly romantic is independent from other people. 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.

19% of the population of a large country is hopelessly romantic.

This means that $p = 0.19$

Two people are randomly selected

This means that $n = 2$

What is the probability both are hopelessly romantic?

This is P(X = 2). So

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

$P(X = 2) = C_{2,2}.(0.19)^{2}.(0.81)^{0} = 0.0361$

3.61% probability that both are hopelessly romantic.

What is the probability at least one is hopelessly romantic?

$P(X \geq 1) = P(X = 1) + P(X = 2)$

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

$P(X = 1) = C_{2,1}.(0.19)^{1}.(0.81)^{1} = 0.3078$

$P(X = 2) = C_{2,2}.(0.19)^{2}.(0.81)^{0} = 0.0361$

$P(X \geq 1) = P(X = 1) + P(X = 2) = 0.3078 + 0.0361 = 0.3439$

34.39% probability at least one is hopelessly romantic

7 0

3 years ago

Help please I will give Brainliest !!!!1

labwork [276]

Answer:

exactly two factors

Step-by step Explanation:

A prime number is an integer, or whole number, that has only two factors: 1 and itself. Put another way, a prime number can be divided evenly only by 1 and by itself. Prime numbers also must be greater than 1. For example, 3 is a prime number, because 3 cannot be divided evenly by any number except for 1 and 3.

5 0

3 years ago

Help please!!!

Maslowich

y varies directly with x.

The constant of variation is k = 7

Step-by-step explanation:

We have to check whether both vary directly with each other or not.

Every pair of x and y will be considered one by one

If y varies directly with x, it should satisfy y = kx or k = yx

So,

For x= -2, y=-14

$-14 = -2k\\k = \frac{-14}{-2}\\k = 7$

For

x=3, y=21

$21 = 3k\\ k = \frac{21}{3}\\k = 7$

For

x=5, y=35

$35 = 5k\\ k = \frac{35}{5}\\k = 7$

As k is same for all pairs of x and y, it can be concluded that:

y varies directly with x.

The constant of variation is k = 7

Keywords: Proportion, variation

Learn more about proportion at:

#LearnwithBrainly

6 0

3 years ago

) Find the Riemann sum for f(x) = 4 sin(x), 0 ≤ x ≤ 3π/2, with six terms, taking the sample points to be right endpoints. (Round

gayaneshka [121]

Answer: 0.55537

Step-by-step explanation:

Please see workings attached .

5 0

3 years ago