Question

Let f(x) = -4x + 7 and g(x) = 10x - 6. Find f(g(x)).

Answer 1

\[\huge\rm f(\color{red}{g(x)})\textrm {is same as }f(\color{reD}{10x-6})\]
so substitute x for 10x-6 into f(x) function

Answer 2

so it would be x = 3/5?

Answer 3

no f(g(x)) means you should substitute x for g(x) function which is 10x-6
so in other words replace x by 10x-6
x=10x-6

Answer 4

ohh okay

Answer 5

\[\huge\rm f(\color{reD}{10x-6})=-4\color{reD}{x}+7\]
replace the x by 10x-6

Answer 6

wait i'm still confused

Answer 7

okay say it:=)

Answer 8

so what's ur question ?

Answer 9

i don't get what you do after replacing the x with 10x-6

Answer 10

ohh distribute parentheses by 6

Answer 11

\[\huge\rm f(\color{reD}{10x-6})=-4\color{reD}{(10x-6)}+7\]

distribute parentheses by 4 and then combine `like` terms

Answer 12

so then f = -4(20x - 12) + 7 ??

Answer 13

hmm no

Answer 14

multiply both terms in the parentheses by outside number \[\huge\rm a(b+c)=a \times b+a \times c\] like this