Question

Help Plz will medal
Suppose that the functions r and s are defined for all real numbers x as follows.
r(x)=x-4
s(x)=4x^2
Write the expressions for
(r-s)(x)
(r*s)(x)
and evaluate (r+s)(3)

Answer 1

I'm not too sure on this, but don't you just simply plug it in? Do you have the answer(in the back of the book)?

(r-s)(x):
=(x-4)-(4x^2)
=x-4-4x^2

Answer 2

(r*s)(x)
=(x-4)(4x^2)
=4x^3-16x^2

Answer 3

i cant remember and no book online

Answer 4

(r+s)(3)
=3((x-4)+(4x^2))
=3(x-4+4x^2)
=3x-12+12x^2

Answer 5

let you know

Answer 6

all right except last one

Answer 7

ok