document.write( "Question 675604: Twelve more than one-half the square of a number is 30. What is the number? \n" ); document.write( "
Algebra.Com's Answer #419948 by rm29924(97)![]() ![]() You can put this solution on YOUR website! Let x = the number \n" ); document.write( "make an equation \n" ); document.write( "the square of a number is x^2 \n" ); document.write( "to get one-half of the square divide it by 2 \n" ); document.write( "x^2/2 \n" ); document.write( "twelve more means add 12 \n" ); document.write( "x^2/2+12=30 \n" ); document.write( "subtract 12 from both sides \n" ); document.write( "x^2/2=18 \n" ); document.write( "to get rid of the 2 on the bottom multiply both sides by 2 \n" ); document.write( "x^2=36 \n" ); document.write( "to get x we have to take the square root of both sides \n" ); document.write( "x=6\r \n" ); document.write( "\n" ); document.write( "check your work \n" ); document.write( "x^2+12=30 \n" ); document.write( "6^2/2+12=30 \n" ); document.write( "36/2+12=30 \n" ); document.write( "18+12=30 \n" ); document.write( "30=30 \n" ); document.write( " |