SOLUTION: An investor place 3/8 of his money in bonds that give 5% interest and the remainder in bonds that gives 6%. If his annual return on the bonds is 180, how mach was invested in the 6

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Question 364050: An investor place 3/8 of his money in bonds that give 5% interest and the remainder in bonds that gives 6%. If his annual return on the bonds is 180, how mach was invested in the 6% bonds?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
%283%2F8%29M%2A0.05+%2B+%285%2F8%29M%2A0.06+=+180,
0.01875M+%2B+0.0375M+=+180,
0.05625M+=+180
M = 3,200. Therefore he invested %285%2F8%29%2A3200+=+2000$ in the 6% investment.