Ok so the price is 172 dollars for 20 pounds. To find price per pound you divide the price by the total number of pounds, so 172 divided by 20 is $8.60 per pound.
When finding the mean you should first add up all the numbers which are 12,2,8,6 and 57 which will give you a sum of 85 next you should divide your sum by how many numbers there are which is 5 and your answer should be 17
Answer:
X=9
Step-by-step explanation:
12+15=27
18+x=27
27-18=9
X=9