SOLUTION: A mail-order company charges $4 for shipping orders of less than $50, $6 for orders from $50- $200, and $8 for orders over $200. One day the total shipping charges were $2160 for 3
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Question 623957: A mail-order company charges $4 for shipping orders of less than $50, $6 for orders from $50- $200, and $8 for orders over $200. One day the total shipping charges were $2160 for 384 orders. Find the number of orders shipped at each rate if the number of orders under $50 is 12 more than twice the number of orders over $200.
I know how to do determinants but just having a hard time figuring out the equations I should be using. Any help would be appreciated. Thank you
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let 
represent the number of >$200 orders and 
represent the number of $50-$200 orders. We are given that the <$50 orders number 
. So:
Which simplifies to
The cost equation is:
\ =\ 2160)
Which simplifies to:
John
My calculator said it, I believe it, that settles it
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