The stock of Company A lost $2.11 throughout the day and ended at a value of $50.64. By what percentage did the stock decline?

What is the result of adding the system of equations? 2x+y=4 3x-y=6

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Two numbers have a sum of -19. one number is x. what expression represents the other number?