Evaluate (f+g)(4)

$(f + g) (4)$

Simplify by multiplying through.

Apply the distributive property.

$f \cdot 4 + g \cdot 4$

Reorder.

Move $4$ to the left of $f$ .

$4 \cdot f + g \cdot 4$

Move $4$ to the left of $g$ .

$4 \cdot f + 4 \cdot g$

$4 \cdot f + 4 \cdot g$

$4 \cdot f + 4 \cdot g$

Multiply $4$ by $g$ .

$4 f + 4 g$

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