13-8x-13xy+4x-7+7y+3xy
a. 6-4x-13xy+7y+3yx
b. 6-17x^2y+10y^2x
c. -x^4y^3
d. 6-4x+7y-10xy
e. none of these
from what i can tell its D right? but i don't see where the 6 came from
2007-06-04 03:01:32 · 10 answers · asked by Meda 2 in Science & Mathematics ➔ Mathematics
13-7 = 6
-8x+4x=-4x
-13xy+3xy=-10xy
7y=7y
-----------------------
6-4x-10xy+7y
d.6-4x+7y-10xy
2007-06-04 03:05:14 · answer #1 · answered by Adam A 2 · 1⤊ 1⤋
13-8x-13xy+4x-7+7y+3xy
rearrange to put like terms together:
13 - 7 - 8x + 4x -13xy + 3xy + 7y
13-7=6
-8x+4x = -4x (adding x's is like adding apples)
-13xy+3xy = -10xy (adding xy's is like adding oranges)
7y stays the same (prunes)
6 - 4x - 10xy + 7y
you can move terms around without changing the result:
6 - 4x + 7y - 10xy
---
you cannot add together apples and oranges, keep them separate.
Later, you will see how to factor them.
2007-06-04 10:08:20 · answer #2 · answered by Raymond 7 · 1⤊ 0⤋
Add like terms:
13 - 7 = 6
-8x + 4x = -4x
-13xy + 3xy = -10xy
So, the simplified form is -4x + 7y - 10xy + 6
D
2007-06-04 10:05:41 · answer #3 · answered by preichwein 3 · 0⤊ 1⤋
13-7 is 6
put it like this 13-7-8x+4x+7y-13xy+3xy
so 13-7 is 6
-8x +4x is -4x
+7y...well there's nothing to add to it or minus
-13xy+3xy is -10xy
put them all together u'll get the ans
2007-06-04 10:10:00 · answer #4 · answered by Anonymous · 0⤊ 1⤋
Let's put everything together
Units : 13 -7 = 6
X's : -8x + 4x = -4x
Y's: +7y
XYs: -13xy + 3xy = -10xy
So answer is 6 -4x +7y -10xy which is D as you say.
2007-06-04 10:05:59 · answer #5 · answered by welcome news 6 · 0⤊ 1⤋
= (13 - 7) + (4 - 8).x + 7y + (3 - 13).xy
= 6 - 4x + 7y - 10 xy
ANSWER d.
2007-06-04 10:28:22 · answer #6 · answered by Como 7 · 0⤊ 1⤋
yea its D, the 6 comes from 13-7 (...+4x-7+7y...)
2007-06-04 10:06:06 · answer #7 · answered by pito16places 3 · 0⤊ 1⤋
D is correct.
the 6 comes from the 13 - 7 term.
2007-06-04 10:05:58 · answer #8 · answered by Doctor Q 6 · 0⤊ 1⤋
Yes, it's D. The 6 is from 13 (the 1st term) subtract 7 (the5th term).
2007-06-04 10:07:48 · answer #9 · answered by Anonymous · 0⤊ 1⤋
Yeah that is right....
13 - 7 = 6....
See it?!
2007-06-04 10:06:45 · answer #10 · answered by smartphreak 2 · 0⤊ 1⤋