document.write( "Question 311066: Determine whether (2,7) is a solution of 6x+9y=20. Is (2,7) a solution of the equation? Please advise. Find the indicated outputs for f(x) =4x^-4x. f=(0), f=(-1), and f=(2). Thank you. \n" ); document.write( "

Algebra.Com's Answer #222493 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Plug it in and find out.
\n" ); document.write( " $\"6x%2B9y=20\"$
\n" ); document.write( " $\"6%282%29%2B9%287%29=20\"$
\n" ); document.write( " $\"12%2B63=20\"$
\n" ); document.write( " $\"75=20\"$
\n" ); document.write( "That's obviously false, hence (2,7) is not a solution.
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"f%28x%29=4x%5E%28-4x%29\"$
\n" ); document.write( " $\"f%280%29=4%280%5E%280%29%29=4%281%29=4\"$
\n" ); document.write( " $\"f%28-1%29=4%28-1%29%5E%28-4%28-1%29%29=4%28-1%29%5E%284%29=4%281%29=4\"$
\n" ); document.write( " $\"f%282%29=4%282%29%5E%28-4%282%29%29=4%282%29%5E%28-8%29=4%2F256=1%2F64\"$ \n" ); document.write( "

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