PLS someone do this it would reallymean alot

For the first question all u doing is removing the parenthesis

So answer is z to the third power

B is 9y to the 4th power

water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. at this point, equilibrium is reached. in an isotonic solution, the flow of water in and out of the cell is happening at the same rate.

hope this < 3

step-by-step explanation: you take each of the numbers and divide by the amount then you take the range