Question

Which expression represents the product of 3 and the sum of x and y

Answer 1

Recall product means multiply so we will be multiplying 3 and "the sum of x and y".
also sum means to add. so this means x+y
putting this together we get 3 times x+y or
$3(x + y)$

Answer 2

3×(x+y)
3 times (x plus y)