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

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

If f(x)=8-10x and g(x)=5x+4 what is the value of (fg)(-2)?-example-1
User Oleg Dudnyk
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1 Answer

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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
User Brillout
by
8.5k points
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