Lena is a software saleswoman. her base salary is $ 1800 , and she makes an additional $ 120 for every copy of english is fun she sells. let p represent her total pay (in dollars), and let n represent the number of copies of english is fun she sells. write an equation relating p to n . then use this equation to find her total pay if she sells 27 copies of english is fun.

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.