Answer:
1.1x
x + 0.1x
Explanation:
The manager of a store marks up all items by 10%. 
So, if the original price of any item is x, then increase for markup is 10% of x i.e. 
. 
Hence, the expression that represents the new price with the markup is (x + 0.1x) = 1.1x. 
Therefore, options C and D i.e. 1.1x and (x + 0.1x) both are the required expression for the new price. (Answer)