Six years ago, Robert’s age was __________. a = Robert’s present age
Which expression models this situation?
Responses
A 6a6a
B a + 6a + 6
C a – 6a – 6
D a –(-6)a –(-6)
E 6 - a6 - a
The correct expression that models this situation is B: a + 6.
This is because six years ago, Robert's age would have been a - 6. So, we add 6 to a get a + 6, which represents Robert's age six years ago.