Is {(-4, 5), (1,-1), (2,-2)} represent a function

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

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.)

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table