anonymous
  • anonymous
Could somebody please help me study for a pre-algebra test? I have some questions.
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
slaaibak
  • slaaibak
We will be here to answer your questions :)
anonymous
  • anonymous
Okay thanks! I really appreciate it.
anonymous
  • anonymous
Okay. sooo, this is really broad, but I don't understand negative exponents.... At all.

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

Akshay_Budhkar
  • Akshay_Budhkar
So you got some specific questions or do you want me or us to explain you negative exponents from scratch?
anonymous
  • anonymous
Ummmmmmm. Why does a negative exponent make a fraction? I don't understand the basic concept.
slaaibak
  • slaaibak
Negative exponents simply means this: \[a^{-x} = {1 \over a^x}\]
Akshay_Budhkar
  • Akshay_Budhkar
yea slaaibak got it
anonymous
  • anonymous
Yes but why are they defined that way?
Akshay_Budhkar
  • Akshay_Budhkar
it is simple
Akshay_Budhkar
  • Akshay_Budhkar
do you know \[a^x \times a^y= a^{x+y}\]
anonymous
  • anonymous
No.
Akshay_Budhkar
  • Akshay_Budhkar
now say we want \[a^x \times a^y = 1\]
anonymous
  • anonymous
Well yeah I do sorry.
anonymous
  • anonymous
Okay.
anonymous
  • anonymous
You'd made one negative!!! AHHH I GET IT!
Akshay_Budhkar
  • Akshay_Budhkar
so when we solve that we get \[a^{x+y}= 1 = a^0\]
Akshay_Budhkar
  • Akshay_Budhkar
thats good! You get it :D
anonymous
  • anonymous
Teehee! Wow that just clicked. My math teacher didn't explain it that way.......
Akshay_Budhkar
  • Akshay_Budhkar
its my pleasure helping you click it :D
anonymous
  • anonymous
So another thing, how do you deal with #s with exponents in a fraction?
slaaibak
  • slaaibak
Give an example please?
anonymous
  • anonymous
Ummmm. How do you make fractions with this equation thing?
slaaibak
  • slaaibak
type over
anonymous
  • anonymous
...
Akshay_Budhkar
  • Akshay_Budhkar
3 over 4 \[3 \over 4\]
slaaibak
  • slaaibak
Use this code: {1 over 2} would be \[{1 \over 2}\]
anonymous
  • anonymous
... Um can I just say it?
Akshay_Budhkar
  • Akshay_Budhkar
yea what is your doubt? i do not comprehend it
slaaibak
  • slaaibak
yeah sure
anonymous
  • anonymous
Okay so if you had y^-5 times 2^3 over y^4 times x^2.
anonymous
  • anonymous
Or something to that effect.
Akshay_Budhkar
  • Akshay_Budhkar
\[ y^-5 \times 2^3 \over y^4 \times x^2.\]
slaaibak
  • slaaibak
\[{ y^{-5} * 2^3 \over y^4 * x^2}\]
Akshay_Budhkar
  • Akshay_Budhkar
is that your query?
anonymous
  • anonymous
Lol yeah.
slaaibak
  • slaaibak
You're faster than me xD
Akshay_Budhkar
  • Akshay_Budhkar
i am not lol
anonymous
  • anonymous
=.=
anonymous
  • anonymous
?
slaaibak
  • slaaibak
If there's multiplication, you can take y^-5 and but it below the line, \[y^{-5} = {1 \over y^5}\] You can immediately write 2^3 as 8. So now you have: \[{1 \over y^5} * {8 \over x^2 * y^4}\]
slaaibak
  • slaaibak
put*, not but
slaaibak
  • slaaibak
Then, you can multiply similar variables with eachother and add the powers. it becomes: \[8 \over y^9 * x^2\]
anonymous
  • anonymous
What are you talking about?
Akshay_Budhkar
  • Akshay_Budhkar
about the question you asked
slaaibak
  • slaaibak
I made a spelling mistake in my post.
anonymous
  • anonymous
Yeah but how did you get y^9?
anonymous
  • anonymous
I know you have to add... Or subtract the exponents or something.
slaaibak
  • slaaibak
\[y^4 * y^5 = y^{5 + 4}\]
anonymous
  • anonymous
OH okay.
Akshay_Budhkar
  • Akshay_Budhkar
the main aim of such questions is to convert your negative exponents into positive by taking its reciprocal
anonymous
  • anonymous
Um one more thing. How would you get {1 over 9} % of 90. Or something like that.
anonymous
  • anonymous
Aw shoot. I messed up the thing.
anonymous
  • anonymous
\[{1 \over 9}\]
Akshay_Budhkar
  • Akshay_Budhkar
percent is always divided by 100
anonymous
  • anonymous
Yes.
Akshay_Budhkar
  • Akshay_Budhkar
so 1/9 percent is \[(1/9 ) \over 100 = 1\over900\]
Akshay_Budhkar
  • Akshay_Budhkar
1/900
anonymous
  • anonymous
Sure...
Akshay_Budhkar
  • Akshay_Budhkar
of 90 is 1/900 of 90.. of implies multiplication
Akshay_Budhkar
  • Akshay_Budhkar
so it is 1/900 times 90 = 90/900 = 1/10
anonymous
  • anonymous
Yes yes I get it.
anonymous
  • anonymous
That makes sense! Okay that's all! And I have to go. Thank you so much. ^.^
Akshay_Budhkar
  • Akshay_Budhkar
it is my pleasure

Looking for something else?

Not the answer you are looking for? Search for more explanations.