SOLUTION: I'm helping my stepson with pre- algebra and I'm confused about this as his teacher gave him multiple choice answers but the answer I get is backwards? Here is the problem : 9-10-

Question 658228: I'm helping my stepson with pre- algebra and I'm confused about this as his teacher gave him multiple choice answers but the answer I get is backwards? Here is the problem :
9-10-11x+4x
I keep getting the answer as 1-7x
the teacher has an answer of -7x-1
Help me please!!
Respectfully,
Lala in doubt :)
Found 2 solutions by jim_thompson5910, solver91311:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
9-10 = -1 and NOT +1

-11x + 4x = -7x

so 9-10-11x+4x simplifies to -7x-1
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

9 minus 10 is -1, so your answer should have been which is the same thing as the teacher's . The 'backwards' thing makes no difference, it is the missing sign that is the problem. On the off chance that the teacher is saying that is incorrect, then s/he must have given specific instructions to write terms in descending order of degree (the -7x term being degree 1 and the -1 term being degree 0).

John

My calculator said it, I believe it, that settles it

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