Given f(x) = 7 – 2x find f(-4).
2007-12-29 03:21:52 · 11 answers · asked by cutter1890 1 in Science & Mathematics ➔ Mathematics
7-2(-4)= 15
2007-12-29 03:25:27 · answer #1 · answered by Anonymous · 0⤊ 2⤋
f(-4) simply means let x = -4
therefore:
if f(x) = 7 – 2x,
f(-4) = 7 - 2 (-4)
= 7 + 8
= 15
2007-12-29 11:27:28 · answer #2 · answered by efc_skillage 2 · 0⤊ 0⤋
f(-4)=7-2(-4)=7+8=15
2007-12-29 11:27:00 · answer #3 · answered by someone else 7 · 1⤊ 0⤋
you plug -4 in wherever there was an x in the first equasion. so yu would have
7-2(-4)
7-(-8)
7+8
15
2007-12-29 11:34:04 · answer #4 · answered by Anonymous · 0⤊ 0⤋
f(x)=7-2x
substitute -4 for x
so its now f(-4)=7-2(-4)
f(-4)=7+8=15
so the answer is 15 =]
2007-12-29 12:06:26 · answer #5 · answered by Anonymous · 1⤊ 0⤋
you plug in -4 for x
f(-4) = 7-2(-4)
f(-4) = 7+8
f(-4)= 15
2007-12-29 12:07:58 · answer #6 · answered by roxane33 4 · 0⤊ 0⤋
f( -4)= 7 - 2( -4).
= 7+8=15.
Ans. f(-4)= 15.
2007-12-29 14:21:23 · answer #7 · answered by Sasi Kumar 4 · 0⤊ 2⤋
hey this is really easy
let x=-4 and plug it in f(x)
so f(-4)=7+8=15
2007-12-29 18:36:12 · answer #8 · answered by Miguel 2 · 0⤊ 2⤋
f(x) = 7 - 2x
f (-4) = 7 - 2(-4)
f (-4) = 7 - (-8)
f (-4) = 7 + 8
f(x) = 15
2007-12-29 11:29:45 · answer #9 · answered by Richard S 6 · 1⤊ 0⤋
f (- 4) = 7 - 2 ( - 4 )
f (- 4) = 7 + 8
f (- 4) = 15
2007-12-29 12:21:12 · answer #10 · answered by Como 7 · 4⤊ 0⤋