Question

Consider the functions f(x) = 3x(to the 2nd power) + 1 and g(x) = x + 3. What is the value of f[g(−1)]?

A. 7

B. 37

C. 13

D. 12

Answer 1

i THINK you have to set it up like this: 3(x+3)^2+1

Answer 2

and if its g(-1) then you plug in -1 for x

Answer 3

which would get you 2
so it'd be 3(2)^2+1
which is 3(4)+1
12+1=13

Answer 4

yeah im pretty sure its c
lol

Answer 5

Thank you!! :D :D :D!

Answer 6

no problem (: i just had to think about it a little

Answer 7

Consider the functions f(x) = 2(x − 3) and g(x) = 3x. What is the value of (f + g)(3)?

A. 0

B. 9

C. −9

D. 2

Answer 8

give me a sec i have to work this out

Answer 9

Okays

Answer 10

ok first plug in 3 for the x values in f(x) = 2(x-3)

Answer 11

what do get?

Answer 12

B?

Answer 13

lol you catch on quick and i didnt even have to explain the rest of it. GOOD JOB :D

Answer 14

Thank you

Answer 15

no problem (:

Answer 16

Select the equations that are parallel and perpendicular to y = −3x − 1 and that pass through the point (3, 1).


A. parallel: y = −3x + 6
perpendicular: y = (1/3)x + 2(2/3)

B. parallel: y = −3x + 10
perpendicular: y = (1/3)x

C. parallel: y = -(1/3)x
perpendicular: y = −3x

D. parallel: y = (1/3)x + 1
perpendicular: y = 3x − 1

Answer 17

i dont know that one you're going to have to ask in a new question.

Answer 18

Okay!

Answer 19

What about this?

Consider the functions f(x) = 2(x − 7) and g(x) = 2x. What is the value of (f − g)(4)?
A. −6
B. 14
C. −14
D. −8