document.write( "Question 1118698: Consider the line x/4 + y/8 = k where k is a positive number.
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document.write( "a) In terms of k, write down the coordinates of A and B, the points where the line meets the x and y axes respectively.
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document.write( "b) The area of triangle AOB, where O is the origin, is 144 units^2. Find the value(s) of k. \n" );
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Algebra.Com's Answer #734103 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Consider the line x/4 + y/8 = k where k is a positive number. \n" ); document.write( "a) In terms of k, write down the coordinates of A and B, the points where the line meets the x and y axes respectively. \n" ); document.write( "---- \n" ); document.write( "Meets x axis means y = 0:: \n" ); document.write( "x/4 + 0/8 = k \n" ); document.write( "x = 4k \n" ); document.write( "------------ \n" ); document.write( "Meets y axis means x = 0:: \n" ); document.write( "0/4 + y/8 = k \n" ); document.write( "y = 8k \n" ); document.write( "------------------- \n" ); document.write( "b) The area of triangle AOB, where O is the origin, is 144 units^2. Find the value(s) of k. \n" ); document.write( "------ \n" ); document.write( "Plot the points:: A(4k,0) and B(0,8k) and O(0,0) \n" ); document.write( "Notice the triangle AOB. \n" ); document.write( "base = 4k \n" ); document.write( "altitude = 8k \n" ); document.write( "----- \n" ); document.write( "Equation: \n" ); document.write( "(1/2)(4k)(8k) = 144 u^2 \n" ); document.write( "16k^2 = 144 u^2 \n" ); document.write( "k^2 = 9 u^2 \n" ); document.write( "k = 3 units \n" ); document.write( "------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "----------- \n" ); document.write( " \n" ); document.write( " |