anonymous
  • anonymous
What is the value of f(x) = 9x when x = -2?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
A. 1/81 B. 81 C. 1/18 D. 18
anonymous
  • anonymous
Is x an exponent?
Sillybutt100
  • Sillybutt100
just plug in x it should look like 9-2

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More answers

anonymous
  • anonymous
9-2 is not there 9 * -2 is not there
Sillybutt100
  • Sillybutt100
no you have to solve it to
anonymous
  • anonymous
9x = -2 ?
Sillybutt100
  • Sillybutt100
no you take 9 then subract two from it
Sillybutt100
  • Sillybutt100
subtract*
anonymous
  • anonymous
We are having a good time, but where is lujanels1 who has the original problem?
Sillybutt100
  • Sillybutt100
I have no idea
Sillybutt100
  • Sillybutt100
How good are you with rational expressions?
anonymous
  • anonymous
I have taught them. Got a question?
Sillybutt100
  • Sillybutt100
How do you solve an equation like this: \[\frac{ a ^{3}+3a-28 }{a ^{2}-49}\]
anonymous
  • anonymous
Equation? What does it equal? Factor top and bottom. Cancel like factors. Just like a regular fraction.
anonymous
  • anonymous
thanks guys ! but I don't think the answer I got was correct
anonymous
  • anonymous
If x is an exponent 9 ^ (-2) the answer is there.
anonymous
  • anonymous
the answer is not 18, and that is what i got so i didn't solve it right.
anonymous
  • anonymous
Are you told 18 is right?
anonymous
  • anonymous
it doesn't say. it just doesn't look right.
anonymous
  • anonymous
\[f(x) = 9^{x} \] Is that the problem?
anonymous
  • anonymous
yes
anonymous
  • anonymous
So find out what 9 ^ (-2) is. What do ya get?
anonymous
  • anonymous
Any progress on your problem Sillybutt100?
anonymous
  • anonymous
okay I got 1/81
anonymous
  • anonymous
Oh yeah!
anonymous
  • anonymous
thanks!

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