SaammmJJ SaammmJJ

30-04-2017
Mathematics

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If f(x)=8-10x and g(x)=5x+4 what is the value of (fg)(-2)?

If fx810x and gx5x4 what is the value of fg2 class=

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mreijepatmat mreijepatmat

30-04-2017

First, calculate f(g(x))==> you plug (5x+4) in the value of x in f(x)

==>f(g(x))= 8-[10(5x+4)===>8-50x-40===>f(g(x))= -50x + 32

& f(g(-2))= -100+32 =68.

There is a mistake in your answers, it should be 68 & not 78

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