Question

I need some help on this ridiculous question right here

Answer 1

Answer:

$f( - 9) = 9 - 7 \times - 9 \\ \\ = 9 + 63 \\ \\ = 72.....answer$

Answer 2

Answer:

Step-by-step explanation:

If f(x) = 9-7x

f(9) = f(x-9=0) = f(x=9)

f(x=9) = 9-7(9)

f(x-9) = 9-63

f(x-9) = -54