Answer:
$10.50
Step-by-step explanation:
If 2 pounds of peaches costs $4.20 then you would divide by 2 to find how much 1 pound costs. After I divided I got $2.10. $8.40 is 4 pounds. If we add one more we get 5. So add $2.10 to $8.40 and you get $10.50. Hope this helps! <3