F(x)=x+7 if you know the domain is {-9,-3} then the range must be?

Multiplying an even number of negative numbers gives an answer that is choose from:

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

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.)