Question

Find the sum of :
12c5 + 7c + 8 and c5 + c

A. 13c5 + 8c + 8
B. 12c10 + 7c2 + 8
C. 13c10 + 8c2 + 8
D. 12c5 + 7c2 + 8

Answer 1

B ?

Answer 2

Just add the like terms and get the answer...

Answer 3

no, it is not B...

Answer 4

C ?

Answer 5

@waterineyes those are the only 2 that make sense to me ?

Answer 6

What are you doing??
Just guessing or any logic in that??

Well, it is not C..

Answer 7

i added the variables together 12c5 + c5. then 7c +c and 8.

Answer 8

@jim_thompson5910 : what am i doing wrong ?

Answer 9

@SmoothMath : can you please tell me why my answers are not correct and what im doing wrong please ?

Answer 10

Yes, you are adding the exponents instead of the coefficients.
x+x does not give you x^2.
It gives you 2x.

Answer 11

so would 12c5 + c5 end up equaling13c5 then ? & 7c + c end up equaling 7c^2 ?

Answer 12

12c^5 + c^5 = 13c^5
Yes.
7c+c is not 7c^2, however.