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1. The domain of f(x) = -2x + 5 is 

{1, 2, 3, 4, 5} what is the range?

 

2. Evaluate the function, f(x) = -5x + 7 given each of the following:

a) f(10) =              b) Find x if f(x) is 32

 Feb 27, 2019
 #1
avatar+194 
+1

1.  f(1)= -2(1) +5=  -2+5 =3

     f(2)= -2(2) +5= -4+5 = 1

     f(3)= -2(3) +5= -6+5 = -1

     f(4)= -2(4) +5= -8+5 = -3

     f(5)= -2(5) +5= -10+5 = -5

⇒ range is { 3,1,-1,-3,-5 }

 

2.

     a) f(10)=  -5(10) +7= -50 +7= 43

 

    b) x=32/f

 

 

cool

 Feb 27, 2019
 #2
avatar+18324 
+1

2.    f(10) =  -5(10) + 7 = -50 +7 = - 43

 

  f(x) =32

        32 = -5x+7

        25 = -5x

         x = -5

 Feb 27, 2019
edited by ElectricPavlov  Feb 27, 2019

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