Answer:
$19.99
Step-by-step explanation:
Take the price for 2 pairs and divide by 2 to get the price for one pair
39.98 /2
19.99 for one pair
I may be wrong but I got x³- 2 + 12.
49x2 − 81
(7x-9) (7x+9)
Try this option (see the attacthed file; answer is marked with red colour); note, that
answer: 2 m/h.