$$ 1.1 x+x+x= $$ A $$ \quad x^{3} $$ B $$ \quad 3 x $$ C $$ \quad 3 x^{3} $$ D $$ 4 x $$

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Let's evaluate the given expression step by step:

$$
1.1x + x + x
$$

1. **Combine Like Terms:**
   $$
   1.1x + x + x = 1.1x + 1x + 1x
   $$
   
2. **Add the Coefficients:**
   $$
   1.1x + 1x + 1x = (1.1 + 1 + 1)x = 3.1x
   $$
   
However, none of the provided options match $$3.1x$$. It's possible there might be a typographical error in the question. If we consider $$1.1x$$ as a simple coefficient multiplication (assuming it should be $$1x$$), the expression simplifies to:

$$
1x + x + x = 3x
$$

**Given the options:**

A. $$x^3$$  
B. $$3x$$  
C. $$3x^3$$  
D. $$4x$$

The best possible answer is:

**Answer: B $$ \quad 3 x $$**
The answer is $$3x$$, choice B.

A
B
C
D

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