Answer: d+0.1d
Step-by-step explanation:
The price of sandwich in the restaurant is d dollars.
Due to increase in cost, there was a price increased and 10% was added to the earlier price.
To get the new price, we add the earlier price to 10% of the earlier price.
Earlier price =d
New price= d + (10% of d)
= d + (10/100 × d)
= d +0.1d