Algebra/Functions/Answers

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Algebra
  1. f(x) = 4x/5
  2. f(x) = x + 5x
  3. f(x) = x + 3x
  4. f(x) = x^7 - x
  5. f(x) = x - 3y
  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