What are the common difference between successive terms in the sequence? 9,2.5,-4,-10.5,-17

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)

Solve for x where 0 equation: cot^2x+2cotx+1=0

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.