Question

HELP W 18, 19,20 SHOW WORK (7thgrademath)

Answer 1

I cant answer 20 because some of the words are gone but...
18. A
Like terms can be added together and use the same units of measurement
19. C
N to the power of three would be n x n x n not n plus n plus n

Answer 2

Answer:

18. A

19. C

20. B

Step-by-step explanation:

I don't know if I'm 100% correct, sorry if it's wrong </3