It’s my first time here I need help on this question

What is the lowest common multiple (LCM) of 3 and 4

Kazeer [188]

Answer:

12

Step-by-step explanation:

The Least Common Multiple (LCM) of some numbers is the smallest number that the numbers are factors of. Like the LCM of 3 and 4 is 12, because 12 is the smallest number that 3 and 4 are both factors for.

8 0

2 years ago

Read 2 more answers

Hi guys can you help me can you do this calculation with the working pls<br>$36 - $17.85 =

d1i1m1o1n [39]

Answer:

$18.15

Step-by-step explanation:

Here, we want to find the difference between the two values

what we do here simply is to subtract the second from the first

Mathematically we have this as;

36-17.85 = $18.15

3 0

1 year ago

Pls help asap i'll give first brainliest

otez555 [7]

Answer:

Step-by-step explanation:

First box is 7x. second is 7+x,third is x-7 last is 2x +7

6 0

3 years ago

What is the equation of a line which includes points (-5, 5) and (2, 5)?

sveta [45]

<h2>Hello!</h2>

The answer is:

The equation of the line which includes the points (-5,5) and (2,5) is:

$y=5$

To find the line which includes the points (-5,5) and (2,5) we can use the following equation:

$y-y_1=\frac{y_2-y_1}{x_2-x_1}*(x-x_1)$

So, using the points (-5,5) and (2,5), we have:

$y-5=\frac{5-5}{2-(-5)}*(x-(-5))$

$y-5=\frac{0}{2+5}*(x-(-5))$

$y-5=0*(x+5)$

$y-5=0$

$y=5$

We have that the equation of the line which includes the points (-5,5) and (2,5) is:

$y=5$

Have a nice day!

Note: I have attached a picture for better understanding.

8 0

2 years ago

A study of the pricing accuracy of checkout scanners at a store found that one of every 20 items is priced incorrectly. On any g

GalinKa [24]

Answer:

a) There are going to be at least 15 items both priced correctly, and incorrectly, which means that we can use the normal approximation to the binomial to solve the exercise in this supposed problem.

b) 20.36% probability that exactly one of the five items is priced incorrectly by the scanner

c) 22.62% probability that at least one of the five items is priced incorrectly by the scanner

Step-by-step explanation:

For each item, there are only two possible outcomes. Either it is priced correctly, or it is not. The probability of an item being priced incorrectly is independent of other items. 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.

Five items selected.

This means that $n = 5$

One of 20 is priced incorrectly.

This means that $p = \frac{1}{20} = 0.05$

a) Assuming that this store sells thousands of items every day, which probability distribution would you use and why?

There are going to be at least 15 items both priced correctly, and incorrectly, which means that we can use the normal approximation to the binomial to solve the exercise in this supposed problem.

b) What is the probability that exactly one of the five items is priced incorrectly by the scanner?

This is P(X = 1).

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

$P(X = 1) = C_{5,1}.(0.05)^{1}.(0.95)^{4} = 0.2036$

20.36% probability that exactly one of the five items is priced incorrectly by the scanner

c) What is the probability that at least one of the five items is priced incorrectly by the scanner?

Either no items are priced incorrectly, or at least one is. The sum of the probabilities of these events is decimal 1. So

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

We want $P(X \geq 1)$ . So

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

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

$P(X = 0) = C_{5,0}.(0.05)^{0}.(0.95)^{5} = 0.7738$

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.7738 = 0.2262$

22.62% probability that at least one of the five items is priced incorrectly by the scanner

5 0

2 years ago