document.write( "Question 176332: Two rainstorms occured in one week in a certain area in the first storm 30mL of rain fell per hour, and in the second storm 15 mL of rain fell per hour. Rain fell that week for a total of 45 hours for a total rain fall of 975 mL how long was each storm. \r
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Algebra.Com's Answer #131438 by ptaylor(2198)![]() ![]() You can put this solution on YOUR website! Let x=length of 30ml storm \n" ); document.write( "then 45-x=length of the 15ml storm \n" ); document.write( "Amount of rainfall for the 30ml storm=30x \n" ); document.write( "Amount of rainfoall for the 15ml storm=15(45-x)\r \n" ); document.write( "\n" ); document.write( "Now we know that the total amount of rainfall equals the sum of the above two amounts, so: \n" ); document.write( "30x+15(45-x)=975 get rid of parens \n" ); document.write( "30x+675-15x=975 subtract 675 from each side \n" ); document.write( "30x-15x+675-675=975-675 collect like terms \n" ); document.write( "15x=300 divide each side by 15 \n" ); document.write( "x=20 hr----------------------------------length of 30ml storm \n" ); document.write( "45-x=45-20=25 hr------------------------------length of 15ml storm\r \n" ); document.write( "\n" ); document.write( "CK \n" ); document.write( "20*30+25*15=975 \n" ); document.write( "600+375=975 \n" ); document.write( "975=975\r \n" ); document.write( "\n" ); document.write( "Does this help??------ptaylor \n" ); document.write( " |