document.write( "Question 1041460: A baker wants to sell 40 cookies averaging $0.90 each by combining cookies selling for $0.80 each and cookies selling for $1.20 each. How many of each kind of cookie is needed? \n" ); document.write( "
Algebra.Com's Answer #656409 by josgarithmetic(39623)\"\" \"About 
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Same as simple two part mixture problem.\r
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\n" ); document.write( "\n" ); document.write( "u how much cheap cookies
\n" ); document.write( "v how much expensive cookies\r
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\n" ); document.write( "\n" ); document.write( "\"system%28%280.80u%2B1.20v%29%2F40=0.90%2Cu%2Bv=40%29\"\r
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\n" ); document.write( "The analysis was written as a system of two equation, in two unknown variables. You can convert this into a single equation in one unknown, as done in the other example problem. Look at another example demonstrating that idea: using just one unknown variable for a two-part mixture problem
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