Algebra/Functions/Answers

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1. $f (x) = 4 x / 5$

2. $f (x) = x + 5 x$

3. $f (x) = x + 3 x$

4. $f (x) = x^{7} - x$

5. $f (x) = x - 3 y$

6. $f (x) = x / 2 * (y + 3)$

7. a) 10

  b) 5
  c) 35
  d) -10

8. a) 11

  b) 1
  c) 2.3
  d) -10

9. a) 49

  b) 9/25
  c) 28.09
  d) 36

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