Answer:
C. 4.2a + 0.8
Step-by-step explanation:
Given:
The two binomials given for addition are:
and 
Now, adding both the binomials, we get:

Distributing the positive sign inside the second binomial, we get:

Now, combining like terms using the commutative property of addition, we get:

Simplifying the above expression, we get:

Therefore, the resulting addition of the given binomials is 
Hence, option C is the correct answer.
20
Constant in a mathematical expression is a term whose value never changes.
The terms with x and y will vary based on the variable x and or y.
Group A = 28 cards Group B = 68 cards Group A + Group B = 96 cards What is the biggest number that evenly divides 28, 68, and 96? Answer the question to find the answer.