Simplify the expression.
9a2b4
3a3b3

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

What is the simplified form of square root of 400 to the 100th power ?