Mark says that 3.002 must be less than 3.0019, since 2 is less than 19. Explain why he is wrong.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Which of the following is an equation of a line parallel to the equation y=4x+1?

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.