Colton has math and reading homework tonight. He can solve each math problem in 3 min and he can read each page in 1.5 min. The number of pages he reads is twice the number of math problems solved and it took him 54 min to complete all of his homework. Determine the number of math problems Colton solved and the number of pages he read

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.