given f(x) = 2x - 5, find f(a + 3)
I get the answer of 2a + 1..i did 2(a+3) -5=
2a + 6 - 5
please advise someone..
2007-07-13 13:29:26 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
f(x) = 2x-5
f(a+3) = 2(a+3) - 5
=2a+6-5
=2a+1
You r rite.........
2007-07-13 13:33:51 · answer #1 · answered by kiru 2 · 0⤊ 0⤋
You are on the right track. Think of f as an operator.
f acts on x to give 2x - 5
f acts on (a + 3) to give:-
2 (a + 3) - 5 = 2a + 6 - 5 = 2a + 1
2007-07-14 21:19:24 · answer #2 · answered by Como 7 · 0⤊ 0⤋
you have started correctly and the answer you have is correct as well:
f(a+3) = 2(a+3) - 5 distribute through parenthesis
= 2a + 6 - 5 combine like terms
= 2a + 1
f(a+3) = 2a+1
2007-07-13 14:09:40 · answer #3 · answered by bnhawk03 3 · 0⤊ 0⤋
f(x) = 2x - 5
f(a+3) = 2(a+3) - 5 = 2a + 6 -5 = 2a +1
2007-07-13 13:34:50 · answer #4 · answered by kellenraid 6 · 0⤊ 0⤋
you are on the right track, now just combine your 6 and your -5, and you will have your answer.
2007-07-13 13:32:56 · answer #5 · answered by Anonymous · 0⤊ 1⤋
You're on the right track indeed.
2007-07-13 14:39:53 · answer #6 · answered by sweetwater 7 · 0⤊ 0⤋
look it up
2007-07-13 13:32:56 · answer #7 · answered by ♥ƒaℓℓєη Ληgєℓ♥ 3 · 0⤊ 3⤋