SOLUTION: A wild bird seed mix is made by combining 100lb of millet seed costing $0.60 per pound with sunflower seeds costing $1.10 per pound. How many pounds of sunflower seeds are needed

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: A wild bird seed mix is made by combining 100lb of millet seed costing $0.60 per pound with sunflower seeds costing $1.10 per pound. How many pounds of sunflower seeds are needed       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 1154828: A wild bird seed mix is made by combining 100lb of millet seed costing $0.60 per pound with sunflower seeds costing $1.10 per pound. How many pounds of sunflower seeds are needed to make a mixture that costs $0.70 per pound?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = pounds of sunflower seeds needed
-----------------------
+%28+.6%2A100+%2B+1.1x+%29+%2F+%28+100+%2B+x+%29+=+.7+
+60+%2B+1.1x+=+.7%2A%28+100+%2B+x+%29+
+60+%2B+1.1x+=+70+%2B+.7x+
+.4x+=+10+
+x+=+25+
25 pounds of sunflower seeds are needed
----------------
check:
+%28+.6%2A100+%2B+1.1x+%29+%2F+%28+100+%2B+x+%29+=+.7+
+%28+.6%2A100+%2B+1.1%2A25+%29+%2F+%28+100+%2B+25+%29+=+.7+
+%28+60+%2B+27.5+%29+%2F+125+=+.7+
+87.5+%2F+125+=+.7+
+.7+=+.7+
OK