document.write( "Question 85997: Rewrite the equation 4x-6y=-30 as a function of x.\r
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document.write( "Bob invested $20,000, part at 14% and part at 13%. If the total interest at the end of the year is $2,720, how much did he invest at 14%?\r
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document.write( "One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.\r
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document.write( "The lenght of a rectangle is 8 in., more than twice its width. If the perimeter of the rectangle is 64., find the width of the rectangle.\r
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document.write( "Thank you for helping me out. I really appreciate it.\r
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Algebra.Com's Answer #62183 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Rewrite the equation 4x-6y=-30 as a function of x. \n" ); document.write( "6y=4x+30 \n" ); document.write( "3y=2x+15 \n" ); document.write( "y=(2/3)x+5 \n" ); document.write( "---------------------- \n" ); document.write( "Bob invested $20,000, part at 14% and part at 13%. If the total interest at the end of the year is $2,720, how much did he invest at 14%? \n" ); document.write( "Let amt. invested at 14% be \"x\"; interest on this is 0.14x dollars \n" ); document.write( "Amt. invested at 13% will be \"20,000-x\"; interest on this is 0.13(20000-x) \n" ); document.write( "= 2600-0.13x dollars \n" ); document.write( "EQUATION: \n" ); document.write( "interest + interest = 2720 \n" ); document.write( "0.14x + 2600-0.13x = 2720 \n" ); document.write( "0.01x = 120 \n" ); document.write( "x = $12,000 (invested at 14%) \n" ); document.write( "20000-x = $8,000 (invested at 13%)\r \n" ); document.write( "\n" ); document.write( "------------------- \n" ); document.write( "One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number. \n" ); document.write( "Let one number be \"x\"; The other number is \"x+12\" \n" ); document.write( "EQUATION: \n" ); document.write( "x+2(x+12)=39 \n" ); document.write( "3x+24=39 \n" ); document.write( "3x = 15 \n" ); document.write( "x=5 \n" ); document.write( "------------------\r \n" ); document.write( "\n" ); document.write( "The length of a rectangle is 8 in., more than twice its width. If the perimeter of the rectangle is 64., find the width of the rectangle. \n" ); document.write( "Let width = x inches \n" ); document.write( "Length = 2x+8 inches \n" ); document.write( "Perimeter = 2(length+width) \n" ); document.write( "64 = 2(2x+8+x) \n" ); document.write( "32 = 3x+8 \n" ); document.write( "3x=24 \n" ); document.write( "x=8 inches \n" ); document.write( "width = 8 inches \n" ); document.write( "============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |