anonymous
  • anonymous
help me multiply and divide rational expreaaions
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
What is the equation?
anonymous
  • anonymous
\[24/7^{2} \times 14^{6}/ 40\]
anonymous
  • anonymous
Ok. Do you understand the "power rules" such as 7^2 = 49?

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More answers

yuki
  • yuki
usually it makes it easier to break down the numbers into its prime factors for example, 24 = \[2^3 * 3\] then you divide out whatever is on the numerator and denominator
anonymous
  • anonymous
yeah i understand power rules . but do you cross mutiply
anonymous
  • anonymous
No. You horizontally multiply. Cross multiplication is for terms on either side of the = sign.
anonymous
  • anonymous
oh ok got it lol
yuki
  • yuki
for future reference, kitkat, what you wanted to say is probably cross "division" you meant to cancel the terms on the top and the ones on the bottom right?
anonymous
  • anonymous
whattt ?
anonymous
  • anonymous
What Yuki was implying... Examine 7^2 and 14^6. How can the 14^6 eliminate 7^2?
anonymous
  • anonymous
yall are confusing me know .. so i 7\[\times\] 7 = 49 then
anonymous
  • anonymous
14^6 can be rewritten as 7*2(14^5)
anonymous
  • anonymous
That will cancel out 7^2 and make it just 7
anonymous
  • anonymous
so...
anonymous
  • anonymous
what im really bad at math
anonymous
  • anonymous
Let me explain :)
anonymous
  • anonymous
haha ok (:
anonymous
  • anonymous
(24/7^2) * 14^6/40 = (24/7) / 2(14^5)/40 We've taken a step to reduce the equation
anonymous
  • anonymous
sorry, i meant (24/7) * 2(14^5)/40
anonymous
  • anonymous
im confused :/
anonymous
  • anonymous
24/7 can be rewritten as 6*4/7 and 2(14^5)/40 can be rewritten as 2(14^5)/(4*10) The 4's will cancel and you'll have 6/7 * 2(14^5)/10
anonymous
  • anonymous
okayy i think i get it so the answer should be 6\[^{4}\]/5
anonymous
  • anonymous
no the answer will be 92198.4 6 * 2(14^5) = 6453888 7*10=70 3226944/0 6453888/70 = 92198.4
anonymous
  • anonymous
mmmmm ... idk about that
anonymous
  • anonymous
lol, it works out. it's tough explaining it on the computer.
anonymous
  • anonymous
lol it really is but on my answer sheet it says
anonymous
  • anonymous
A\[6^{4}/5\]. b \[6^{3}/5\] .c.\[336^{6}/280^{2}\]
anonymous
  • anonymous
or d.\[42^{4}/35\]
anonymous
  • anonymous
vry odd. I just put it in my TI 89 calc and got my same answer. Bad answer sheet? I'm 99.9% sure I did the math correctly.
anonymous
  • anonymous
well its for school lol . so..
anonymous
  • anonymous
Double check with your teacher. I'm very confident I gave you the right solution.

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