Question

Which expression represents John's age in eight years, when y represents his present age? y + 8 8y y−8 y8

Answer 1

The question is asking how old will John be 8 years from now, so if John is 20 now, he will be 28 eight years later. 
So the expression is y+8

Answer 2

Answer: $y+8$

Step-by-step explanation:

Given : The present age of John is denoted as 'y'.

Then, the mathematical expression represents John's age in eight years will be :-

$y+8$  [We add 8 to y]

Therefore , the expression represents John's age in eight years, when y represents his present age is $y+8$.