document.write( "Question 972971: An item that sells for $145.99 has a sales tax of 10.22\r
\n" ); document.write( "\n" ); document.write( "Find a mathematical model that gives the amount of sales tax y in terms of the retail price x\r
\n" ); document.write( "\n" ); document.write( "Use the model to find the sales tax on a purchase that has a retail price x
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Algebra.Com's Answer #595239 by macston(5194)\"\" \"About 
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\n" ); document.write( "($10.22/$145.99)(100%)=7%
\n" ); document.write( "y=sales tax; x=retail price
\n" ); document.write( "y=0.07x
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