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08-08-2017
Mathematics

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Use f (x)=7 and g (x)=x+5 to evaluate (f+g)(3)=

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08-08-2017

(f+g)(3)=f(3)+g(3)

f(x)=7 so f(3)=7
g(x)=x+5 so g(3)=3+5=8

(f+g)(3)=f(3)+g(3)=7+8=15

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x+y+z=-6 x-y+3z=-18 2x+2y+2z=-8