Answer:
Option 1 : 5x + 50 + x
Option 5: 6x + 50
Explanation:
The given expression is 5(x + 10) + x
5(x + 10) = 5x + 50 by expanding the brackets
So
5(x + 10) + x = 5x + 50 + x
The first choice , 5x + 50 + x corresponds to the above so that is a correct choice
Second is incorrect
Third is incorrect
Fourth is incorrect
If we simplify 5x + 50 + x we get 6x + 50 which is same as the fifth choice