-9 and -4.17777777777777....... what are they?
2007-09-08 06:40:46 · 10 answers · asked by la la la 2 in Science & Mathematics ➔ Mathematics
A rational number is described as one that can be written as a fraction.
-9 obviously can (-9/1, for example)
4.1777.. also can, although you may not be aware how:
let f = 4.1777...
=> 10f = 41.777....
=>100f = 417.777....
=> 100f - 10f = 417.777.... - 41.777...
=> 90f = 416 - 40 = 376
=> f = 376/90
which is a fraction! So 4.17777... is rational!
2007-09-08 06:48:37 · answer #1 · answered by steppy333 2 · 1⤊ 0⤋
Well, -9 is rational. It's an integer, as a matter of fact.
-4 is rational and an integer as well...now, about that .17777777 thing ... that's 8/45. So you have -4 8/45...which is a fraction...which is rational.
2007-09-08 13:49:55 · answer #2 · answered by PMP 5 · 0⤊ 0⤋
-9 is Rational because its a definite negative number and -4.117777777777777..... is Irrational because it has a repeating decimal number. Examples of Irrational 1/3 because if you evaluate its 0.333333333.......... Square root of 3 is irrational because is you evaluate its 1.73205080756887729...... Examples of Rational 1, 1/2 because if you evaluate its 0.5, 1/8 because if you evaluate its 0.125.
2007-09-08 13:56:01 · answer #3 · answered by Charles D 2 · 0⤊ 0⤋
Both numbers are rational since - 9 = -27/3 and
-4.7777777777... = -37.6/9
2007-09-08 14:31:04 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
i think that -9 is rational, and -4.177777777777 is irrational, because its not a whole number. rational numbers, can be written as a fraction, and irrational numbers, cannot be written as a fraction
2007-09-08 13:49:33 · answer #5 · answered by Natalie E 2 · 0⤊ 1⤋
both rational
rational can be written as faction, and in decimal form, they are either repeating or terminating. irrational can't be written as fractions and they are non repeating and non terminating.
-9 as a fraction is -9/1 -4.17777777777777777 is written as
2007-09-08 13:45:25 · answer #6 · answered by pockethotrod 3 · 0⤊ 0⤋
agree both are rational.. because both can be expressed as a quotient of two other numbers
2007-09-08 13:48:38 · answer #7 · answered by Grand Phuba 5 · 0⤊ 0⤋
irrational, numbers that go on forever are irrational numbers
2007-09-08 14:04:51 · answer #8 · answered by Zero 4 · 0⤊ 0⤋
9 is but - 4.1777... maybe not because of the seemingly infinite repetition of decimal.
2007-09-12 06:19:21 · answer #9 · answered by Jun Agruda 7 · 3⤊ 0⤋
rational i think
2007-09-08 13:48:54 · answer #10 · answered by Trew 2 · 0⤊ 0⤋