document.write( "Question 938059: Marianne is 4 years older than Anna and 2 years older than Khate. 4 years ago, thrice Marianne's age devided by Anna's age was # years less than Khate's age. Find their present ages? \n" ); document.write( "
Algebra.Com's Answer #571549 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! m = Maria's present age \n" ); document.write( "a = Ann's present age \n" ); document.write( "k = Kate's present age \n" ); document.write( ": \n" ); document.write( "Write an equation for each statement \n" ); document.write( ": \n" ); document.write( "Marianne is 4 years older than Anna and 2 years older than Khate. \n" ); document.write( "m = a + 4 \n" ); document.write( "or \n" ); document.write( "a = (m-4) \n" ); document.write( ": \n" ); document.write( "m = k + 2 \n" ); document.write( "or \n" ); document.write( "k = (m-2) \n" ); document.write( "; \n" ); document.write( " 4 years ago, thrice Marianne's age divided by Anna's age was 3 years less than Khate's age. \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "replace a with (m-4) and k with (m-2) \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "3m - 12 = (m-8)(m-9) \n" ); document.write( "3m - 12 = m^2 - 17m + 72 \n" ); document.write( "Combine like terms on the right \n" ); document.write( "0 = m^2 - 17m - 3m + 72 + 12 \n" ); document.write( "A quadratic equation \n" ); document.write( "m^2 - 20m + 84 = 0 \n" ); document.write( "Factors to \n" ); document.write( "(m-6)(m-14) = 0 \n" ); document.write( "Two solutions \n" ); document.write( "m = 6, not a reasonable answer \n" ); document.write( "m = 14 yrs is Maria's age \n" ); document.write( "then \n" ); document.write( "a = 14 - 4 = 10 yrs is Ann's age \n" ); document.write( "and \n" ); document.write( "k = 14 - 2 = 12 yrs is Kate's age\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |