Math
posted by ?? on .
A grocery store wants to make a mixture of nuts consisting of cashews and pecans. The cashews sell for $4 per pound while the pecans sell for $10 a pound. How many pounds of each nut must be mixed to produce a 6 pound mixture that sells for $8 per pound.

total cost is
4c + 10(6c) = 8*6
4c + 60  10c = 48
6c = 12
c = 2
so p = 4
Note that $8 is 2/3 of the way from $4 to $10, and so p is 2/3 of the final mix. 
If I had 40 pounds of pecans and each pound is $2.50 how much money will I have

A deli charges $2.50 for the first pound of meat, and $.75 for each additional pound.this is represented by the equation c=2.50+0.75,how many pounds I buy