Answer:
Here is a graph I created.
For Miguel to spend the least amount of money, he would have to buy 2 gallons for $5.98 and two 1/2 gallons for $4.20. The total is $10.18.
I'm stuck on the next question though.
I'm pretty sure it would be "is at most" "is less than" and "does not exceed"
Answer:
I think it's C. Sorry if it's incorrect! I worked it out in like 2 min.