## Intermediate Algebra (6th Edition)

$x+2x+10+4x-25=300$ $7x=315$ $x=45$ In 2010, the predicted percent increase since 2009 is 45%. $2x+10=100$ In 2011, the predicted percent increase since 2009 is 100%. $4x-25=155$ In 2012, the predicted percent increase since 2009 is 155%.