SOLUTION: use f(x)=4x-6 and g(x)=5x^2 to evaluate each of the following A) (f+g)(5) b) (f-g)(-7) c) (fg)(6) d) (f/g)(0)

Algebra ->  Expressions -> SOLUTION: use f(x)=4x-6 and g(x)=5x^2 to evaluate each of the following A) (f+g)(5) b) (f-g)(-7) c) (fg)(6) d) (f/g)(0)      Log On


   

Question 963532: use f(x)=4x-6 and g(x)=5x^2 to evaluate each of the following
A) (f+g)(5)
b) (f-g)(-7)
c) (fg)(6)
d) (f/g)(0)
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

use f%28x%29=4x-6 and g%28x%29=5x%5E2 to evaluate each of the following
A) %28f%2Bg%29%285%29
%28f%2Bg%29%285%29=f%285%29%2Bg%285%29
%28f%2Bg%29%285%29=4%2A5-6%2B5%2A5%5E2
%28f%2Bg%29%285%29=20-6%2B5%2A25
%28f%2Bg%29%285%29=14%2B125
%28f%2Bg%29%285%29=139

b)
%28f-g%29%28-7%29
%28f-g%29%28-7%29=f%28-7%29%2Bg%28-7%29
%28f-g%29%28-7%29=4%28-7%29-6%2B5%28-7%29%5E2
%28f-g%29%28-7%29=-28-6%2B5%2A49
%28f-g%29%28-7%29=-34%2B245
%28f-g%29%28-7%29=211
c)
%28fg%29%286%29=f%286%29%2Ag%286%29
%28fg%29%286%29=%284%2A6-6%29%2A%285%2A6%5E2%29
%28fg%29%286%29=18%2A180
%28fg%29%286%29=3240
d)
%28f%2Fg%29%280%29=f%280%29%2Fg%280%29
%28f%2Fg%29%280%29=%284%2A0-6%29%2F%285%2A0%5E2%29
%28f%2Fg%29%280%29=-6%2F0..........unidentified,infinity