need help with sons' homework.
2007-04-25 14:10:17 · 7 answers · asked by kylmccrckn 1 in Education & Reference ➔ Homework Help
kamcrash, when 4n is isolated, why do the 36 and 5 go negative?
2007-04-25 14:29:52 · update #1
You need to distribute the 4 across what's in parentheses. So,
5 + 4n + 4*9 = -3
5 + 4n + 36 = -3
4n + 41 = -3
4n = -44
n = -11
Or, think of the (n+9) quantity as a variable X
5 + 4X = -3
4X = -8
X = -2
n+9 = -2
n = -11
2007-04-25 14:15:24 · answer #1 · answered by Matt S 2 · 1⤊ 0⤋
First, distribute the 4
5 + 4n + 36 = -3
Then isolate the n
4n = -3 - 5 - 36
combine like terms
4n = -44
divide by 4
n = -11
2007-04-25 21:15:34 · answer #2 · answered by kamcrash 6 · 0⤊ 0⤋
5 + 4(n + 9) = -3
5 + 4n + 36 = -3
4n + 36 = -8
4n = -44
n = -11
2007-04-25 21:16:44 · answer #3 · answered by lvliss.lvlanda 4 · 0⤊ 0⤋
5+4n+36=-3
4n+41=-3
4n=-44
n= -11
2007-04-25 21:16:36 · answer #4 · answered by Robert L 7 · 0⤊ 0⤋
5+4(n+9)=-3
5+4n+(9*4)=-3
5+4n+36=-3
4n=-3-36-5
4n=-44
n=-11
2007-04-25 21:15:27 · answer #5 · answered by Emmy 2 · 0⤊ 0⤋
-11
2007-04-25 21:47:14 · answer #6 · answered by Anonymous · 0⤊ 0⤋
the answer is -11
2007-04-25 21:17:18 · answer #7 · answered by storm8105 3 · 0⤊ 0⤋