How to find a number to add to both the numerator and denominator?

Which situation results in a final value of exactly zero?

Divide the following polynomials (2x2+x+3) / (x-2)

What is the value of this expression? (-4) to the fourth power

Rebecca wants to put 544 pennies in a coin collection book. the blue book fits 9 pennies per page. the red book fits 7 pennies per page. how many more pages would she need if she used the red book rather than the blue one?

Cesar boughy 2 bottles of juice that each homd 2 quarts and another bottle that holds1and1half gallons of juice. how many quarts of juice did he buy

What is the answer to this problem? 7-3x - 15=19

1/2a - 1/2 = - 3 solve the following equation

Henry wants to resize a 10 inch wide by 12 inch long photograph for the school newspaper. It is to fit in a space that is 5 inches wide. What is the length of the resized photograph in inches? a. 6 inches c. 4 inches b. 12 inches d. 7 inches

If X = 3 units, Y = 9 units, and Z = 5 units, what is the volume of the right rectangular pyramid shown above?

How many solutions does the equation 6y - 3y - 7 = - 2 + 3 have? A. Two B. None C. Only one D. Infinitely many Also explain how you got the answer so i can learn more about it.