6. Use a one unit multiplier to convert 20 inches to centimeters. 7. Use two unit multipliers to convert 25 feet to centimeters.

should be 15.

Step-by-step explanation:

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square