To solve this problem, you'll need to subtract 25 (total quantity of roasted almonds) by the remaining variable of roasted almonds (3 1/2 lbs.), resultant towards finding how many pounds of roasted almonds Xavier had sold; Xavier had sold 21 1/2 pounds of almonds.
50 minutes long because .10 x 50 is 5.00
Perpendicular means the product of the slopes is -1.
Since the green line has slope of -1/4, then the answer will be 4