document.write( "Question 566117: I am taking and online algebra class in college and my professor gave us a project and one of the questions is to solve this equation:\r
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document.write( "7[-6+5(-3+5)]\r
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document.write( "When I do the problem I keep getting -14. However my calculator keeps showing the answer as 28. I feel dumb because it is not a hard problem to figure out but I cannot seem to figure out what the correct answer is. Please help! \n" );
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Algebra.Com's Answer #366117 by Edwin McCravy(20054)![]() ![]() You can put this solution on YOUR website! \r\n" ); document.write( "Remember \"PEMA\"\r\n" ); document.write( "\r\n" ); document.write( "Parentheses, Exponents, Multiplication, Addition. [Remember that division is\r\n" ); document.write( "a special kind of multiplication, and that subtraction is a special kind of\r\n" ); document.write( "addition. Some people use \"PEMDAS\", but that sometimes makes students think\r\n" ); document.write( "that multiplication comes before division and that addition comes before\r\n" ); document.write( "subtraction, when it doesn't. That is determined by left takes precedence over\r\n" ); document.write( "right]\r\n" ); document.write( "\r\n" ); document.write( "Just do one operation at a time, and copy everything else over and don't skip\r\n" ); document.write( "steps, and you'll always get the right answer.\r\n" ); document.write( "\r\n" ); document.write( "7[-6+5(-3+5)]\r\n" ); document.write( "\r\n" ); document.write( "First we look for Parentheses. The innermost parentheses is (-3+5), so we\r\n" ); document.write( "replace that by (2) and copy everything else over:\r\n" ); document.write( "\r\n" ); document.write( "7[-6+5(2)]\r\n" ); document.write( "\r\n" ); document.write( "We look again for parentheses, the innermost one is now [-6+5(2)], and within \r\n" ); document.write( "that parentheses we look for a parentheses. We find (2) but there is nothing\r\n" ); document.write( "to do in that parentheses, so we go next to exponents within that set of\r\n" ); document.write( "parentheses [-6+5(2)]. There are no exponents in there. So we look for\r\n" ); document.write( "multiplication and we see 5(2) which we replace by 10 and copy everything else\r\n" ); document.write( "over:\r\n" ); document.write( "\r\n" ); document.write( "7[-6+10]\r\n" ); document.write( "\r\n" ); document.write( "We look again for parentheses, the innermost one is now [-6+10], and within \r\n" ); document.write( "that parentheses we look for a parentheses. Within that there is only -6+10 to\r\n" ); document.write( "do, so we replace [-6+10] by [4] and copy everything else over:\r\n" ); document.write( "\r\n" ); document.write( "7[4]\r\n" ); document.write( "\r\n" ); document.write( "Finally we multiply 7 by 4 and get 28\r\n" ); document.write( "\r\n" ); document.write( "Answer: 28\r\n" ); document.write( "\r\n" ); document.write( "Edwin \n" ); document.write( " \n" ); document.write( " |