Question

9a-b-2a-10b
A)-7a+11b
B)11a+9b
C)-11a-9b
D)7a-11b
Help please

Answer 1

All you have to do here is combine like terms. Do you know what like terms are ?

Answer 2

no

Answer 3

Like terms are terms that have EXACTLY the same letters.
Example :
2x and 3x are like terms and can be added to equal 5x
3x and 4y are not like terms and you cannot do anything with them.

So lets look at our problem...
9a - b - 2a - 10b

can you find the like terms ?

Answer 4

9a-2a=7a?

Answer 5

correct.....9a - 2a = 7a
are there any more like terms ?

Answer 6

I don't think so

Answer 7

what about -b - 10b ?
Keeping in mind that -b is the same as -1b.

Answer 8

so D?

Answer 9

yes...because..
9a - 2a = 7a
-1b - 10b = -11b
put it all together and you get : 7a - 11b

Answer 10

thank you so much

Answer 11

anytime :)