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Emma
Emma asked in Science & MathematicsMathematics · 6 months ago

What is the value of (g o f ) ?

f(x) = -2x + 8 

g(x) = 3x 

what is the value of ( g o f ) (3) 

a) 6 

b) x + 8 

c) 23 

d) -10 

2 Answers

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  • Philip
    Lv 6
    6 months ago

    Put g°f = h;

    Then h = 3(-2x+8) = 24-6x;

    h(3) = 24-18 = 6;

  • Puzzling
    Lv 7
    6 months ago

    ( g o f ) (3) is another way of writing g( f(3) ).

    Start by calculating f(3):

    f(x) = -2x + 8 

    f(3) = -2(3) + 8 

    f(3) = -6 + 8

    f(3) = 2

    Then calculate g(2):

    g(x) = 3x 

    g(2) = 3(2)

    g(2) = 6

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