Final answer:
After spending $3.25 on a notebook and saving $9.75, Meghan has $7 left for trail mix. Since each package costs $1.75, the inequality $1.75x ≤ $7 shows that Meghan can buy up to 4 packages of trail mix.
Step-by-step explanation:
To solve the problem of how many packages of trail mix Meghan can buy after purchasing a notebook and saving a certain amount of money, we must set up an inequality. Initially, Meghan has $20. After buying a notebook for $3.25, she is left with $20 - $3.25 = $16.75. She needs to save $9.75, which leaves her with $16.75 - $9.75 = $7 to spend on trail mix.
Let's denote the number of trail mix packages as x. Each package costs $1.75, so the total cost for x packages would be $1.75x. Since Meghan can spend a maximum of $7 on trail mix, the inequality will be
$1.75x ≤ $7.
To find the maximum number of trail mix packages Meghan can buy, we now divide both sides of the inequality by $1.75:
x ≤ $7 / $1.75
x ≤ 4
Therefore, Meghan can buy up to 4 packages of trail mix.