Final answer:
To determine how many hats and scarves Henry can knit with 2000 yards of yarn, the inequality 250h + 525s <= 2000 is used, representing the yardage used by hats and scarves, not to exceed the total available yarn.
Step-by-step explanation:
Henry wants to maximize the number of hats, h, and scarves, s, he can knit with his 2000 yards of yarn. Since each hat uses 250 yards and each scarf uses 525 yards, we can create an inequality to describe this situation: 250h + 525s ≤ 2000. This inequality shows the combinations of hats and scarves Henry can knit without exceeding his 2000 yards of yarn.