QuestionSuppose that the functions $s$ and $t$ are defined for all real numbers $x$ as follows. $$\begin{array}{l} s(x)=4 x \\ t(x)=3 x-1 \end{array}$$
Write the expressions for $(s \cdot t)(x)$ and $(s+t)(x)$ and evaluate $(s-t)(-2)$. $$\begin{array}{r} (s \cdot t)(x)= \\ (s+t)(x)= \\ (s-t)(-2)= \end{array}$$ $\square$ $\square$ $\square$