document.write( "Question 103093: Given g(x) = 5x – 2, find g(3a).\r
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document.write( "HELP I have no idea how to do this problem and no one else seems to be able to tell me how to do it either. Can someone help please? \n" );
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Algebra.Com's Answer #74942 by oberobic(2304)![]() ![]() ![]() You can put this solution on YOUR website! The idea here is to substitute the new value into the function.\r \n" ); document.write( "\n" ); document.write( "Usually, f(x) is the function, but this time it is g(x).\r \n" ); document.write( "\n" ); document.write( "We are told, g(x) = 5x - 2.\r \n" ); document.write( "\n" ); document.write( "That is the function. Think of it like a machine that takes some input and multiplies it by 5 and then subtracts 2: Input x and out comes 5x-2.\r \n" ); document.write( "\n" ); document.write( "Here were are told to find g(3a), so they are telling us that x=3a. Simply substitute: Plug in 3a to the \"function machine\" and out comes 5 times 3a - 2:\r \n" ); document.write( "\n" ); document.write( "g(3a) = 5(3a) - 2\r \n" ); document.write( "\n" ); document.write( "g(3a) = 15a - 2 \n" ); document.write( " \n" ); document.write( " |