<PRE><B>Question 1040359</B>
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A certain compound is a mixture of two concentrations of iron which are 44% and 29%. How many pounds of each concentration must be used to form 50 lbs.of compound having 38% iron?
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Equation:
iron + iron = iron
0.44x + 0.29(50-x) = 0.38*50
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44x + 29*50 - 29x = 38*50
15x = 9*50
x = 30 lbs (amt. of 44% needed)
50-x = 20 lbs (amt of 29% needed)


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