2007-12-02 05:08:13 · 18 answers · asked by mo 1 in Science & Mathematics ➔ Mathematics
This is a question in my math class and I need to figure out what the real answer would be.
2007-12-02 05:15:38 · update #1
this is because the variable "X" could equal anything and if x was less than seven you would have to divide the equaltion by zero of a negative number which is not possible
2007-12-02 05:11:31 · answer #1 · answered by Johnny Apple Seed Picker 2 · 0⤊ 2⤋
Good question! Sine you can plug any number in for X, let's use two examples to show why the answer is not 2.
If x is 100, it would read 2(100)-7/100-7 -->
this is simplified to 193/93 = 2.075
Now, if we make x = 5, let's see how it is different.
2(5)-7/5-7
10-7/-2
3/-2 = -1.5
There is no single numeric answer, since you don't have a defined value for x.
2007-12-02 05:19:26 · answer #2 · answered by Tom 1 · 0⤊ 0⤋
Distribute. 5(x-5) 7(x+2) 5x-25 +2x = 7x+14 - 39 Simplify (combine like words on each and each side). 7x-25 = 7x-25 because that each and each side equivalent a similar problem, the answer is B) All genuine numbers
2016-10-25 07:48:53 · answer #3 · answered by coulanges 4 · 0⤊ 0⤋
I do not understand your logic. That fraction cannot be simplified more. It is a continuous function that has a non-constant y value over all real x values besides 7. It would equal 2 only at its limits of infinity.
2007-12-02 05:14:01 · answer #4 · answered by Jonathan J 2 · 0⤊ 1⤋
This function is a continuous function. Therefore, there is no definitive answer for what the function is equal to in this question. Without knowledge of what your value for x is, I can not begin to guess what your function is equal to, seeing as there are billions of possibilities for what your function could equal!
2007-12-02 05:42:04 · answer #5 · answered by jtg719 1 · 0⤊ 0⤋
because to solve the problem one needs to no what X is. normally one would take your first phrase "2x-7" and solve for X, but since we don't no what 2x-7 equals we cant solve for x. also you cannot divide 2x-7 by x-7 as you would if you were dividing the phrase by 2 to get x by itself.
2007-12-02 05:12:52 · answer #6 · answered by Anonymous · 0⤊ 1⤋
if it was just 2x/x then it would be equal to 2 but as you minus an ODD number the answer could never be 2
2007-12-02 05:12:33 · answer #7 · answered by wag1 2 · 0⤊ 1⤋
2x-7/x-7 isn't equal to 2 because its 2x not just x:
example 2(-1) - 7 / -1 - 7
_______-2 - 7 / -8
_______-9 / -8
_______-1.125 which obviously isn't 2.
If it was 2(x - 7) / x - 7 then it would be equal to 2.
Hope that was helpful. :D
2007-12-02 05:14:46 · answer #8 · answered by Matty B 3 · 0⤊ 1⤋
b/c the 2 does not multiply all the way through the numerator...therefore you can't cancel the x-7
2007-12-02 05:12:04 · answer #9 · answered by Bing 2 · 0⤊ 1⤋
You left something out of the problem - you didn't show an equation, so there's no way to calculate what is.
2007-12-02 05:13:39 · answer #10 · answered by Judy 7 · 0⤊ 1⤋