The graph shows the motion of two cars starting at different places on a highway. Their speeds can be compared by comparing the steepness of the graphed lines. Which statement is true? Math item stem image CLEAR CHECK Car A is faster than Car B. Car B is faster than Car A. Cars A and B are traveling at the same speed. More information is needed to know which car is traveling the fastest.

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.