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Function Evaluation

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Function Evaluation Answer Key

1. 
Evaluate [math]f(3)[/math] given that [math]f(x)=3x+5[/math].
  1. [math]f(3)=8[/math]
  2. [math]f(3)=14[/math]
  3. [math]f(3)=3[/math]
  4. [math]f(3)=-2/3[/math]
2. 
Evaluate [math]f(1)[/math] given that [math]f(x)=13x-16[/math].
  1. [math]f(1)=-3[/math]
  2. [math]f(1)=17/13[/math]
  3. [math]f(1)=16/13[/math]
  4. [math]f(1)=3[/math]
3. 
Evaluate [math]f(24)[/math] given that [math]f(x)=1/2x+7[/math].
  1. [math]f(24)=2[/math]
  2. [math]f(24)=-34[/math]
  3. [math]f(24)=34[/math]
  4. [math]f(24)=19[/math]
4. 
Find [math]f(x-4)[/math] given that [math]f(x)=2x-8[/math].
  1. [math]f(x-4)=0[/math]
  2. [math]f(x-4)=2x-16[/math]
  3. [math]f(x-4)=2x[/math]
  4. [math]f(x-4)=1/4[/math]
5. 
Evaluate [math]f(2x)[/math] given that [math]f(x)=28+4x[/math].
  1. [math]f(2x)=4[/math]
  2. [math]f(2x)=7[/math]
  3. [math]f(2x)=28[/math]
  4. [math]f(2x)=8x+28[/math]
6. 
Given [math]f(x)=15-x[/math], evaluate [math]f(8)[/math].
  1. [math]f(8)=15[/math]
  2. [math]f(8)=0[/math]
  3. [math]f(8)=7[/math]
  4. [math]f(8)=8[/math]
7. 
Given [math] f(x) = x+4, \ g(x) = x^2 [/math] find [math]f(g(x-2))[/math].
  1. [math]f(g(x-2))=x^2-4x+8[/math]
  2. [math]f(g(x-2))=x^2+x+2[/math]
  3. [math]f(g(x-2))=x+2[/math]
  4. [math]f(g(x-2))=x^2-4x+4[/math]
8. 
Find [math] f(3x^2+4x-5)[/math] given [math]f(x)=2x+2[/math].
  1. [math]f(3x^2+4x-5)=3x^2+6x-3[/math]
  2. [math]f(3x^2+4x-5)=6x^3+8x^2-10x-3[/math]
  3. [math]f(3x^2+4x-5)=6x^2+8x-10[/math]
  4. [math]f(3x^2+4x-5)=6x^2+8x-8[/math]
9. 
Evaluate [math] f(6) [/math] given [math]f(x)=4x^2-5x+13[/math].
  1. [math]f(6)=4/5[/math]
  2. [math]f(6)=0[/math]
  3. [math]f(6)=127[/math]
  4. [math]f(6)=7[/math]
10. 
Find [math] f(4+3x) [/math] given [math]f(x)=3x-8[/math].
  1. [math]f(4+3x)=9x^2+12x-8[/math]
  2. [math]f(4+3x)=9x^2-12x-32[/math]
  3. [math]f(4+3x)=-4[/math]
  4. [math]f(4+3x)=9x+4[/math]

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