Problema Solution
find the cost per pound of a coffee mixture made from 7ib of coffee that cost $9.80 per pound and 3ib of coffee that cost $8.10 per pound
Answer provided by our tutors
let
x = the price of the coffee mixture per pound
the mixture will have 7 + 3 = 10 lb
the cost of the 7lb + the cost of 3lb = the cost of the mixture 10lb
7*9.80 + 3*8.10 = x*(7 + 3)
by solving we find
x = $9.29
the cost of the mixture is $9.29 per pound.