Answer
$4(y+1)$
Work Step by Step
"The sum of y and 1" means that we are adding $1$ to $y$. We represent this with $(y+1)$. "4 multiplied by the sum of y and 1" means that we need to multiply $4$ by this quantity, giving us $4(y+1)$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.