The expression for the cost of Taxi B is 0.40<em>x</em> + 2.<em></em>The expression for the cost of Taxi A is 0.20<em>x</em> + 4. The inequality asks for when the cost of Taxi B will be greater than Taxi A, so you write it as 0.40<em>x </em>+ 2 > 0.20<em>x</em> + 4, or 0.20<em>x</em> + 4 < 0.40<em>x </em>+ 2.
The answer is B)0.20<em>x</em> + 4 < 0.40<em>x </em>+ 2.