Please tell me how to do it too

With this one. will mark brainliest

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq

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.)