anonymous
  • anonymous
What is the value of the expression? 9(8) ______ 9(-4) * 9(10)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@Leong @stacy.reed08 @dan815
anonymous
  • anonymous
you mean 9 times 8 over [9 times (-4)] times [ 9 times 10] ?
sh3lsh
  • sh3lsh
\[\frac{ 9*4*2 }{9*4*2*-1*9*5}\]

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sh3lsh
  • sh3lsh
Can you solve it from there?
anonymous
  • anonymous
yes, one sec....
sh3lsh
  • sh3lsh
Hint. Like terms cancel out. So it's just 1/-45
anonymous
  • anonymous
yeah, that is what i got
sh3lsh
  • sh3lsh
bam you're the bomb
mathstudent55
  • mathstudent55
\(\dfrac{9(8)}{9(-4) \times 9(10)} =\) \(=\dfrac{72}{-36 \times 90} \) \(=\dfrac{\cancel{72}~2}{\cancel{-36}~-1 \times 90} \) \(= -\dfrac{2}{90} \) \(= -\dfrac{1}{45} \)
anonymous
  • anonymous
@sh3lsh : is 9 times (-4), not -8 so you can't : 9*2*4
mathstudent55
  • mathstudent55
@Leong @sh3lsh did it correctly. The 2 in 9 * 2 * 4 in the denominator comes from the 10 which is 2 * 5. This is how he did it: \(\dfrac{9(\color{red}{8})}{9(\color{blue}{-4}) \times 9(\color{green}{10})} =\) \(=\dfrac{9 \times \color{red}{4 \times 2}}{9 \times \color{blue}{(-1) \times 4} \times 9 \times \color{green}{2 \times 5}} \) \(=\dfrac{9 \times \color{red}{4 \times 2}}{9 \times \color{blue}{4} \times \color{green}{2 \times \color{blue}{(-1) } \times 9 \times 5}} \) \(=\dfrac{\cancel 9 \times \cancel 4 \times \cancel 2 ~1}{\cancel 9 \times \cancel 4 \times \cancel 2 \times (-1) \times 9 \times 5} \) \(= \dfrac{1}{-45} \) \(=-\dfrac{1}{45} \)
anonymous
  • anonymous
ohhhhhhh

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