document.write( "Question 103093: Given g(x) = 5x – 2, find g(3a).\r
\n" ); document.write( "\n" ); 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?
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Algebra.Com's Answer #74942 by oberobic(2304)\"\" \"About 
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
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