anonymous
  • anonymous
Please help, -3xyz for x = -3/4 , y = 5/9 and z = -8/15
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Its evaluate
anonymous
  • anonymous
Replace the variable with the numbers they're equal to \[-3\left(- \frac{ 3 }{ 4 } \right)\left( \frac{ 5 }{ 9 } \right)\left(- \frac{ 8 }{ 15 } \right)\] You can write 3 as 3/1 if it makes it easier \[\left(- \frac{ 3 }{ 1 } \right)\left(- \frac{ 3 }{ 4 } \right)\left( \frac{ 5 }{ 9 } \right)\left(- \frac{ 8 }{ 15 } \right)\] From here, you can cancel common factors and then multiply. Or multiply and then reduce at the end
anonymous
  • anonymous
I did that, but my teacher was like no.

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anonymous
  • anonymous
- 9 / 4?
anonymous
  • anonymous
|dw:1441192359993:dw|
anonymous
  • anonymous
lol what the heck! ? ahh
anonymous
  • anonymous
im confused now
anonymous
  • anonymous
|dw:1441192517680:dw|
anonymous
  • anonymous
|dw:1441192594395:dw|
anonymous
  • anonymous
|dw:1441192656064:dw|
anonymous
  • anonymous
There are 3 negative signs, so the answer is negative. So you're left with -2/3
anonymous
  • anonymous
oh okay, i think i understand!
anonymous
  • anonymous
if i were to show my work how could i do it an easy way to read?
anonymous
  • anonymous
It's definitely better to cancel when you can because then you're not left with big numbers, and you might not even have to multiply anything. To show your work, maybe write the problem once, then write it again showing the canceling. Your teacher should understand that as written, it's pretty common
anonymous
  • anonymous
put it like this
anonymous
  • anonymous
|dw:1441192972789:dw|
anonymous
  • anonymous
That second line probably isn't necessary. It just helps with readability.
anonymous
  • anonymous
lol okay, thanks!
anonymous
  • anonymous
i have a quiz tommorow so thats why i have to show my work.
anonymous
  • anonymous
ah ok. You're welcome :)

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