111 2151 which one is a prime number

Answers

Answer 1

Answer: Neither of those numbers is a prime number, as both are divisible by 3. It's easy to tell when a number is divisible by three, because all you have to do is add up all the individual numbers that make up the big number, and if THAT number is divisible by 3, then so is the big number.

1 + 1 + 1 = 3

3 is obviously divisible by 3, so no further steps need to be taken here.

2 + 1 + 5 + 1 = 9

9 is also divisible by 3.

Neither of those numbers is prime.
Hope that helped! =)

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What is 14 49ths in simplest form

Answers

The answer would be 2/7. This is because you find a Greatest Common Factor, also known as a GCF. In this problem the Greatest Common Factor would be seven because it is the largest number that goes into both 14 and 49. Once you find the GCF (7) you would divide both numbers by that (7) to get them into simplest form. In this problem you would take your GCF (7) and divide both numbers (14 and 47) by your GCF (7) and you would get an answer of 2/7. (2 7ths)

The simplest firm is 2/7

For security, a credit card number is coded in the following way, so that it can be sent as a message. Subtract each digit from 9. 1. Code the credit card number 3201 2342 3458 0931.

2. A coded credit card number is 2341 0135 7923 0133. What is the original credit card number?

3. Find f(x) if x represents a single input digit. What is the domain
of f(x)?

4. Find f-1(x). What is the domain of f-1(x)?

Answers

Answer:

1. 6798 7657 6541 9068.

2. 7658 9864 2076 9866.

3. $f(x)=9-x$ and domain of f(x) is {0,1,2,3,4,5,6,7,8,9}.

4. $f^(-1)(x)=9-x$ and domain of f⁻¹(x) is {0,1,2,3,4,5,6,7,8,9}.

We are given that,

The coding method for the card number is 'Subtract each digit from 9'.

So, we have,

Part 1: The number given is 3201 2342 3458 0931.

So, after subtracting each digit from 9, we have,

The coded number is 6798 7657 6541 9068.

Part 2: The coded number given is 2341 0135 7923 0133.

To find the original number, we will subtract the digits from 9.

The original number is 7658 9864 2076 9866.

Part 3: We have f(x), where x represents the single input digit.

That is, 'x' can have values from {0,1,2,3,4,5,6,7,8,9}.

As, the coded output is the number subtracted from 9.

We get, the function is $f(x)=9-x$ .

So, the domain of f(x) is {0,1,2,3,4,5,6,7,8,9}.

Part 4: We need to find the inverse function.

So, we have, $f(x)=9-x$ i.e. $x=9-f(x)$ .

Thus, the inverse function is $f^(-1)(x)=9-x$

Since, the range of f(x) is the domain of f⁻¹(x).

The domain of f⁻¹(x) is {0,1,2,3,4,5,6,7,8,9}.

Find a product that only contains 2 and 9

Answers

its 18 because I know .

9×2=18 10+8=18. 9+9=18

How do i factorise 1.)au-5b+ ab -5u
2.) 8bx - 15ay - 6by + 20ax
3.) 5pSquare - 8q +2p -20q

Answers

1)u(a-5)+b(-5+a);2). b(8x-6y)+a(15y+20x). 3). I have no idea for the third one....

Which is not an improper fraction equal to 8?

Answers

There are many improper fraction equal to eight, they include: 8/1, 16/2, 24/3, 32/4, 40/5, 48/6, 56/7, 64/8, 72/9 etc.When a multiple of eight is divided by the other factor with with when multiplied to eight gives the multiple, the result will be eight.

What decimal is 1/10 of 0.08

Answers

1/10 * 0.08 = 0.08 * 0.1 = 0.008

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