Which statement about the physical change of liquid water boiling into steam is true? The heat added represents an energy change.
The action cannot be reversed.
The steam cannot conserve mass.
The weight lost represents a mass change.

Although changes result from business transactions, the equality of the fundamental bookkeeping equation must remain. t/f

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?