Pine bluff middle school is having its annual spring fling dance, which will cost $400. the student treasurer reported that the dance fund has $ 75 left over from last year. each ticket to the dance costs $4. let t represent the number of tickets sold. write an inequality to determine how many tickets must be sold to pay for this year's dance.

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.