Keith and michelle went out to dinner. the total cost of the meal, including the tip, came to $53.70. if the combined tip came out to $9.60, and each friend spent an equal amount, how much did each friend pay not including the tip?

Find the surface area of the prism formed by the net

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

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.