Which expression is equivalent to 8+18a−2+6a?

a. 8(1+2a)−(2+6a)

b. 24a + 10

c. 30a

d. 24a+6

The original expression we have is:
8+18a−2+6a
Now, we will add like terms together, this means that we will add 8 and -2 together and 18a and 6a together as follows:
18a+6a + 8-2 = 24a + 6

The correct answer is:
D. 24a+6

Note: You can further simplify this expression by taking 6 as a common factor from both terms, this will give the following expression:
6(4a+1)

Where are the graphs?