For f(x) = 4x-5, find f(3)
a.17
b.-17
c.-11
d. 7
2007-11-12 01:01:04 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
f ( 3 ) = 12 - 5 = 7
OPTION d.
2007-11-12 03:34:17 · answer #1 · answered by Como 7 · 2⤊ 1⤋
f(x) = 4x - 5
find f(3). That just means plug in a "3" for every x in the given equation and calculate.
f(3) = 4(3) - 5 = 12 - 5 = 7
2007-11-12 09:04:45 · answer #2 · answered by Mathematica 7 · 0⤊ 1⤋
Well, do you know how to do function notation?
If it says find f(3), it means you are putting 3 in for x.
So, just get rid of the f(x) thing in the equation and evaluate the expression 4(3) - 5
I'm sure you can do that...
If it said "Find x if f(x) is 3" That means you change f(x) in the equation to 3 and solve:
3 = 4x - 5
You can probably do that too...
2007-11-12 09:05:33 · answer #3 · answered by A A 3 · 1⤊ 1⤋
d
4x3 - 5
12 - 5
7
2007-11-12 09:07:28 · answer #4 · answered by Raistlin M 2 · 0⤊ 1⤋