Which of the following is not a polynomial?
a. 4/x+x/7
b. x^2-4
c. -4/7
d. x^2-4+7x

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

Which number can each term of the equation be multiplied by to eliminate the decimals before solving? 5.6j- 0.12=4+1.1j

The hockey team has been great! in 2008 they won 20% more games than in 2007. in 2009 they won 50% more games than in 2008. what was their overall percentage increase from 2007 through 2009?