# college algebra

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store mixes a Brazilian coffee worth worth \$10 per kilogram and a turkish coffee worth \$13 per kilogram. The mixture is to sell for \$12 per kilogram. Find out how much of each should be used to make a 420-kilogram mixture.

my calculations all came out super wrong

• college algebra -

If there are x kg of Brazilian coffee, then the rest (420-x) is Turkish. So,

10x + 13(420-x) = 12*420
x = 140

Note that 140 is 1/3 of 420, meaning that it drags the price down 1/3 of the way from 13 to 10, or \$12.

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