Answer:
Step-by-step explanation: Chemical signal is the type of communication which coordinates actions between neighboring cells . This ability originated in single cells organisms and was essential for the evolution of multicellular organisms because after a cell receives a message, it is transferred across the plasma membrane and changes are brought about within the cell in response to this message.
B because in commutative property of addition the numbers switch but they do not change the sign nor the numbers. hope this helped
Answer:
1429
Step-by-step explanation:
Break even is expressed as:
5000+2x = 5.5x
5000=5.5x-2x
5000=3.5x

1428.57=x
Since you cannot sell a fractional yo-yo, round up to 1429
12x+4 nnnnnknbhhjnbvgggjjjjij
Answer:
x=8
Step-by-step explanation:
2(x+4)=4x-8
2x+8=4x-8
2x+8-8=4x-8-8
2x=4x-16
2x-4x=4x-16-4x
-2x=-16
Divide by -2 on both sides
and get... X=8