Answer:
The number of protons
Step-by-step explanation:
Its the correct answer
Answer:
3x and 2x can be combined bc it has ex at the end.
1 and 2x cannot be combined bc 1 doesn't have an x.
1 and -5 can be combined
It is B because yiu solve
B)
2x6= 12
2x7= 14
2x8= 16
2x8= 18
