Ask your own question, for FREE!
Mathematics 8 Online
OpenStudy (anonymous):

PLEASE HELP, I AM ABOUT TO CHEW MY ARM OFF OVER THIS!!!!!

OpenStudy (anonymous):

Rocky simplified an expression in three steps, as shown:

OpenStudy (anonymous):

OpenStudy (anonymous):

Which is the first incorrect step and why? Step 1, all the exponents are increased by 2 Step 1, all the exponents are multiplied by 2 Step 2, the exponents in the denominator are added during multiplication Step 3, the exponents of the same base are added during division

OpenStudy (nuttyliaczar):

Keep in mind that anything with a negative exponent is just one over that term with a positive exponent. For example, x^-1 = 1/x

OpenStudy (nuttyliaczar):

Does that help at all?

OpenStudy (anonymous):

Ok, yes that helps ALOT, it's just that i have one more assignment after this one, and i am out of school, So i think i am just stressed out.

OpenStudy (anonymous):

Of thinking if i will pass or not.

OpenStudy (nuttyliaczar):

Well I'm here for any other questions you may have. I'm not saying I'm the best help but I will try my best

OpenStudy (anonymous):

So can you help me eliminate real quick?

OpenStudy (nuttyliaczar):

Yeah I'm here

OpenStudy (anonymous):

I think we can rule out C

OpenStudy (nuttyliaczar):

Yeah multiplying like terms with exponents just means you add their exponents together

OpenStudy (anonymous):

We can eliminate A because, increasing means to add, and they are multiplying it by 2.

OpenStudy (anonymous):

I think it's B

OpenStudy (anonymous):

because they are doing that, in step1

OpenStudy (nuttyliaczar):

Well consider what multiplying the exponents by two means. When you have any term to the 2nd power that just means you multiply it by itself. So if you look at just the numerator here, (x^-5)(y^2) times itself is basically just multiplying the exponents by two

OpenStudy (nuttyliaczar):

Oh woops nvm

OpenStudy (nuttyliaczar):

Stupid mistake, you are right

OpenStudy (nuttyliaczar):

I misread the problem and thought there was only one mistake. Step 3 was a mistake also

OpenStudy (anonymous):

THANK YOU SO MUCH!

OpenStudy (anonymous):

You have been a really big help, i don't if i could have done it without you :)

OpenStudy (nuttyliaczar):

Um actually second-guessing myself now >.>

OpenStudy (nuttyliaczar):

You do just multiply by two

OpenStudy (nuttyliaczar):

Sorry I'm super rusty, been out of school for too long

OpenStudy (nuttyliaczar):

(x^-5)^2 = x^-10

OpenStudy (anonymous):

It's gotta be B because none of the other answer choices are happening in that problem.

OpenStudy (nuttyliaczar):

But B is correct. During step 2 x^6 * x^6 gives us x^12, and that's just (x^6)^2

OpenStudy (nuttyliaczar):

Btw it could be A, since idk what "increased by 2" means

OpenStudy (nuttyliaczar):

Eh I still think it's D, because he shouldn't be adding those exponents during division

OpenStudy (nuttyliaczar):

You always subtract for division

OpenStudy (anonymous):

increasing having the property that for any two points in the domain such that one is larger than the other, the image of the larger point is greater than or equal to the image of the smaller point; nondecreasing.

OpenStudy (nuttyliaczar):

Sorry for all the confusion, I'm sure of this now

OpenStudy (anonymous):

LOL just looked it up, because idk what it meant either

OpenStudy (nuttyliaczar):

Because look at what he does. He adds 12 to -10 for the x term

OpenStudy (nuttyliaczar):

But if he rewrote x^-10 as 1/x^10 he wouldn't have gotten the same

OpenStudy (anonymous):

OH yeah, in division you subtract the exponets, rather than adding them, YOUR RIGHT D IS THE ANSWER

OpenStudy (nuttyliaczar):

Sorry again ^^'

OpenStudy (anonymous):

It's ok, i think i have confused myself, it's not your fault.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!