document.write( "Question 174131: Area of a sail: The area in square meters for a triangular square sail is given by A(x)=x^2+5x+6. Find A(5) If the height of the sail is x+3 meters, then what is the length of the base of the sail?\r
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document.write( "I plugged in 5 in the x variables. A(5)= 5^2 + 5(5) +6 which will equal A(5)=56
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document.write( "Thus, the answer that I got was 11.2 meters. The second question is where I think I am off track. Starting with a^2+b^2=c^2 Do I plug in the 5? I was orignially using the 5 as the hypotenuse. My answers are coming out crazy. I have worked this problem for 2 hours now. I am ready to throw my computer. \n" );
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Algebra.Com's Answer #129031 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! you are over thinking this\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "\"the height of the sail is x+3 meters\" __ 5+3=8\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "area of a triangle is 1/2 * base * height\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "56 = 1/2 * b * 8\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "b = 14\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "BUT--the question may be asking for the general solution\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x^2+5x+6 = 1/2 * b * x+3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "dividing by x+3 __ x+2 = 1/2 * b\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "b = 2x+4 \n" ); document.write( " |