Nancy is checking to determine if the expressions x+4+x and 6+2x−2 are equivalent. When x=3, she correctly finds that both expressions have a value of 10. When x=5, she correctly evaluates the first expression to find that x+4+x=14. What is the value of the second expression when x is equal to 5 , and are the two expressions equivalent?
Answer
A
The value of the second expression is 8 , so the expressions are not equivalent.
B
The value of the second expression is 18 , so the expressions are not equivalent.
C
The value of the second expression is 16 , so the expressions are equivalent.
D
The value of the second expression is 14 , so the expressions are equivalent.