Answer:
D. 2x
Step-by-step explanation:
x · 1 + x/1
= x + x
= 2x
Michelle's result shows f(2) = -13, selection C.
The equivalent expression to the given expression is 
<h3>What is an algebraic expression?</h3>
Algebraic expressions are mathematical expressions. They usually consist of one or more variables with their coefficients and arithmetic operators such as: (division, multiplication, addition, and subtraction).
From the given expression, we are to determine an expression that is equivalent to:

To do this, we are going to simplify the above-given expression to its lowest term since we are not given any options to choose equivalent expressions from.
By doing so, we have:





Learn more about solving algebraic expressions here:
brainly.com/question/4344214
#SPJ1
#1,4 are biased because the number range is too wide. (include #2 if the question allows)
#1: 31-20 = 11
#2: 29-21 = 8
#3: 30-23 = 7
#4: 50-15 = 35 (OMG that's so biased!)
so if the three surveys are eliminated, then the answer to the second question is 23%.
Hope that helps :)
3) x=-6
4) c=5
hope this helped