Question

If given f(x) = –4x – 2 and g(x) = 2x, what is (f · g)(x)?


A.
(f · g)(x) = –6x – 4
B.
(f · g)(x) = –8x2 – 4x
C.
(f · g)(x) = –6x – 2
D.
(f · g)(x) = –16x2 – 4x

Answer 1

f(x) = –4x – 2 and g(x) = 2x
Therefore
(f · g)(x) =–4x – 2 -2x= -6x-2
Hence option C is the corect answer.

@sirizarry78

Answer 2

can you help me with a another one please

Answer 3

@sirizarry78 sure go ahead

Answer 4

If f(x) = 4x – 7 and g(x) = 2x + 4, evaluate f(x) + g(x) for x = –3.
A.
–52
B.
–21
C.
–22
D.
–15

Answer 5

f(x) + g(x) = 4x – 7 +2x + 4 = 6x-3
f(x) + g(x) = 6x-3
substituting x= -3 we find.

f(-3) + g(-3) = 6*(-3)-3=-18-3= -21

Hence option B is the correct answer

@sirizarry78

Answer 6

If http://media.education2020.com/evresources/2003-08-03-00-00_files/i0330000.jpg and g(x) = 3x, evaluate http://media.education2020.com/evresources/2003-08-03-00-00_files/i0330001.jpg for x = 2. @dpasingh