What is the simplified form of 2a + 4 - a?

• A. a + 4
• B. 2a + 2
• C. a + 2
• D. 3a + 4

Answer: (A)

To simplify the expression 2a + 4 - a, you start by combining like terms. The like terms in this expression are the terms that contain the variable "a."

You have 2a and -a. When you combine these, you subtract the coefficient of -1 (which is implied with the -a):

2a - a = (2 - 1)a = 1a or simply a.

Now, the constant term remains unchanged, which is +4.

Putting it all together, you have a + 4, which is the correct simplified expression.

This matches the selected answer, as it accurately reflects the result of combining like terms in the original expression.