Question

To mail 10 letters costs $ 4.50 . How much would it cost for 12 letters? Assume the relationship is proportional.

Answer 1

12 letters cost 6.30 dollars

Explanation:

hope this helps

Answer 2

$5.40 for 12 letters

Explanation:

you need to find the cost for 1 unit then multiply that by 12, so you take the cost (4.50) and divide it by letters (10) so you get 0.45. So that is the cost of q letter, then you that that unit rate and multi[ly it by the number that you need to figure out (12) so .45x12=5.40

12 letters=$5.40