Indicate which property is illustrated in Step 1. Step 1 12 + 10x - 12 - 6x + 6 = 12 + (10x - 12) - 6x + 6 Step 2 = 12 + (-12 + 10x) - 6x + 6 Step 3 = [12 + (-12)] + (10x - 6x) + 6 Step 4 = 0 + (10x - 6x) + 6 Step 5 = (10x - 6x) + 6 Step 6 = (10 - 6)x + 6 Step 7 = 4x + 6 A. additive identity B. associative C. additive inverse D. distributive

Find the unit rate. enter your answer as a mixed number. a fertilizer covers 2/3 square foot in 1/2 hour.

The area of each triangle is 7 square units. the surface area of the triangular prism is

The mountain springs water company has two departments, purifying and bottling. the bottling department received 67,000 liters from the purifying department. during the period, the bottling department completed 65,000 liters, including 3,000 liters of work in process at the beginning of the period. the ending work in process was 5,000 liters. how many liters were started and completed during the period?