Removing Discontinuities Practice Test

A function is $w(x)=\frac{x^3-1}{x-1}$ for $x \neq 1$ and $w(1)=2$; what value makes $w$ continuous at $x=1$?

For a cost function $h(x)=\frac{x^2-4x}{x}$ for $x\ne0$ and $h(0)=7$, what value of $h(0)$ removes the discontinuity?