SOLUTION: if g(x)=7x-a where a is a constant and g(10)=3g(20), then g(30)=

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Question 1133602: if g(x)=7x-a where a is a constant and g(10)=3g(20), then g(30)=
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
g(10)=70-a
g(20)=140-a so 3 g(20)=420-3a
but g(10)=3g(20) so 70-a=420-3a
2a=350
a=175
g(10)=70-175=-105
g(20)=140-175=-35
g(30)=210-175=35 ANSWER