ANSWER(S):
15.51
EXPLANATION(S):
15.51 rounded to nearest tenth is 15
*more than one answer
A: Multiply by 12
The 1/2 is already multiplied by the bh, so in order to "undo" that multiplication, you have to do the opposite, which is to divide.
Answer: 
Step-by-step explanation:
In order to solve this exercise it is important to remember that the "Repeated addition" is about adding equal groups of numbers.
Therefore, you can solve a mulitplication using the Repeated addition by repeat the same number "n" times in order to find the result..
In this case, you have the following multiplication given in the exercise:

You can observe that the number 34 is multiplied by 4. This indicates that the result is four times 34.
Then, based on the explained at the beginning of this explanation, you can conclude that you can also solve the given multiplication by repeating the number 34 four times and then adding the groups.
Therefore, you get:

Hello!
The absolute value of 2x+6 is 2x+6. We will finish solving below.
-3(2x+6)=-12
-6x+6=-12
-6x=18
x=-3
I hope this helps!