2007-07-20 07:19:05 · 6 answers · asked by l h 1 in Science & Mathematics ➔ Mathematics
DE+EF=DF
4x+2+3x=16
7x = 14
x=2
so DE = 4(2)+2
=10
2007-07-20 07:22:32 · answer #1 · answered by sweet n simple 5 · 0⤊ 0⤋
Im assuming DE=4x+2.
So, in that case, since DE+EF=DF, then
(4x+2)+(3x)=16, or 7x+2=16, so x=(16-2)/7=2.
SO, then DE=(4*2)+2=10.
2007-07-20 14:28:30 · answer #2 · answered by yljacktt 5 · 0⤊ 0⤋
given: DE =4x
EF =3x
Df = 16
DE is b/n DF
s/n
DE+EF=Df
4x+3x=16
7x=16
x=16/7
x=2.285714286
therefor:
DE=4x=4*2.285714286=9.14
EF=3x=3*2.285714286=6.86
the answer is none of the above....9.14 is close to 9 not 10
2007-07-20 14:37:18 · answer #3 · answered by CuriousG 3 · 0⤊ 0⤋
Your question says DE = 4x = 2, so DE equals 2.
Is the question what does x equal? If so, then:
4x + 3x = 16
7x = 16
x = 16/7
and so DE = 4 * (16/7) = 9.14
Does your question mean DE = 4x - 2 and you want x? If so, then:
4x - 2 + 3x = 16
7x = 18
x = 18/7
and so DE = 4 * (18/7) - 2 = 10.3
Does your question mean DE = 4x + 2 and you want x? If so, then:
4x + 2 + 3x = 16
7x = 14
x = 2
and so DE = 4 * 2 + 2 = 8 + 2 = 10
2007-07-20 14:28:45 · answer #4 · answered by N E 7 · 0⤊ 1⤋
If you mean DE = 4x+2,
then 4x+2 +3x = 16
7x = 14
x=2
So DE = 4(2)+2 = 10
2007-07-20 14:26:17 · answer #5 · answered by ironduke8159 7 · 0⤊ 0⤋
E is beweet D and F, thus, DE + EF = DF
4x + 2 + 3x = 16
7x = 14
x = 2
DE = 4(2) + 2
DE = 10
2007-07-20 14:24:31 · answer #6 · answered by 7 · 0⤊ 0⤋