Answer
$-\frac{j}{2} + 4$
Work Step by Step
The distributive property states that for any real numbers $a, b$, and $c$,
$a(b+c) = a\cdot b + a\cdot c$
Use the formula above to obtain:
$=-j(\frac{1}{2}) +8(\frac{1}{2})
\\=-\frac{j}{2} + 4$