3. The manager of a store marks up all the items by 10%. If x is the original price, which expression represents the new price with the markup? 0.9x
x
1.1x
x+0.1x
x-0.1x

1.1x
x + 0.1x

Step-by-step 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.