The technology company asks the general contractor to lay gravel on the ground in the area between the warehouse and the fence. Which of the following situations best models the area that the gravel will cover? A = (6 x feet)(6 x feet) - (15 x feet)(8 x feet)
A = 84 x2 feet 2
A = (15 x feet)(8 x feet) - (6 x feet)(6 x feet)
None of the above.

All per-unit concepts rely on ratios, meaning, to provide a type of measurement

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?

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.