Find an equivalent system of equations for the following system: x + 2y = 2 −4x + 4y = −8
x + 2y = 2
−4x − 2y = 10

x + 2y = 2
5x + 4y = 8

x + 2y = 2
5x − 2y = 10

x + 2y = 2
5x − 2y = −8

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c?

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

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.