Answer
$14x+7y+28$
Work Step by Step
RECALL
The distributive property states that for any real numbers a, b, c, and d:
$a(b+c+d)=ab+ac+ad$
Use the distributive property by multiplying $7$ to each term of the trinomial factor to obtain:
$=7(2x) + 7(4) + 7(y)
\\=14x+28+7y
\\=14x+7y+28$