Question

which categories does this fall in? -4/7 Natural, whole, integer, rational, irrational, and real?

Answer 1

irrational

Answer 2

rational, real

Answer 3

rational

Answer 4

Irrational numbers can't be expressed with a ratio.
Rational and Real

Answer 5

of course its not irational we can write is as a ratio, and of course its real...

Answer 6

guys think of 22/7=pie

Answer 7

ok so the final answer is rational and real?

Answer 8

it is irrational

Answer 9

your joking now? this might confuse people

Answer 10

yes

Answer 11

dude lol its not irrational. you cant write irational numbers and you can clearly write this one. as she did in the topic...

Answer 12

yea real though

Answer 13

think of 22/7

Answer 14

yes 22/7 is rational just like -4/7

Answer 15

anything you can write in a ratio is rational...the fact that we can write it as -4/7 means its rational

Answer 16

and pi does not equal 22/7

Answer 17

22/7 is irrational it never ends up with division

Answer 18

ok. well i hope the correct answer is rational and real lol

Answer 19

lol no, google rational numbers.

Answer 20

yea go with it

Answer 21

you are thinking about the decimel part. 22/7 has a repeating decemel where pi does not... and sqrt(2) does not.... but -4/7 does.

Answer 22

if it repeats for ever it is rational

Answer 23

rational numbers are numbers that can be written as a fraction correct?

Answer 24

yes

Answer 25

http://en.wikipedia.org/wiki/Pi#Irrationality_and_transcendence @zzr0ck3r

Answer 26

with two real numbers
pi/7 can be written as a ratio but is not rational

Answer 27

thank you

Answer 28

that's why i mentioned your name..thanks for your suggestion

Answer 29

o sorry:)

Answer 30

:)

Answer 31

ok wel now im going with irrational and real

Answer 32

lol its not irrational

Answer 33

im so confused lol

Answer 34

can you write it with two real numbers as a ratio?

Answer 35

no

Answer 36

then its rational

Answer 37

https://www.wolframalpha.com/input/?i=is+-4%2F7+rational

Answer 38

yes you can -4 and 7

Answer 39

https://www.wolframalpha.com/input/?i=is+-4%2F7+irrational

It's not irrational

Answer 40

we have special symbols for irational numbers. like e, pi, sqrt(2)... notice we cant write any of those numbers as the ratio of two real numbers

Answer 41

im confused, is there a way that you can explain it a little better, like break it down

Answer 42

hence, e, pi, sqrt(2) , sqrt(5), sqrt(any prime number) is irrational

Answer 43

can you write -4/7 as the ratio of two real numbers?
the answer is yes
we can write it with -4 on top and 7 on bottom. thus its rational

Answer 44

will that always be that way. all prime numbers are irrational

Answer 45

no, the square root of any prime number is irrational

Answer 46

all prime numbers are natural numbers, any natural number N can be written as N/1 thus all prime numbers can be written as a ration number. but we are getting off a little bit.

Answer 47

just know that if you can write a number as the ratio of two other numbers, where both numbers are not irrational, then that number is rational

Answer 48

it is rational and real

Answer 49

you can of course have a case where a irrational over a irrational is a rational..like pi/pi = 1 is rational but 1/pi and pi/1 is irrational

Answer 50

omg yall are confusing this poor person lolz

Answer 51

lol @courtneyfay ik im confused im trying to get the hang of it lol

Answer 52

is 5/7 rational?

Answer 53

haha lolz i dont blame u its rational and real

Answer 54

we know its rational and real, im trying to get to the bottom of why.

Answer 55

no i think

Answer 56

wait yes

Answer 57

well explain it easier lolz

Answer 58

right it is

Answer 59

@courtneyfay feel free....

Answer 60

good job :)

Answer 61

its rational because it repeats right

Answer 62

correct, that is one way to look at it.
what about 2/sqrt(2)

Answer 63

ummm i wanna say rational

Answer 64

sqrt(2) is irational and 2 is rational, so 2/sqrt(2) and sqrt(2)/2 are both irational.

Answer 65

also any number that can be written as a/b with no symbols like sqrt(), pi, ln,e, will always be rational. so like 22/32, 67/3209, 56/76544, 100000000/3, 23454/909090909 all rational. any numbers that you can write like digit/digit will always be rational.

Answer 66

the only time you need to worry about irrational is when you have sqrt(), of pi, or e, or ln, or log, or other things like this. The only way we can write irational numbers is with symbols. Think about this. we are saying that we cant write any irratioanl number with just digits, because if we could they would not be rational.

Answer 67

because if we could they would not be irrational*

Answer 68

so is 36/9 rational?

Answer 69

i dont know why im not understanding this. im gonna go with yes

Answer 70

yes because we know anything that can be written as a digit/digit is rational. so is 23/45 and 67/907, and -89898/32455 and 54/-2 all rational?

Answer 71

yess