Answer:
-2n - 12
Step-by-step explanation:
Combine like terms. Note that each term has one variable (n). Also note that one negative sign and one positive sign results in a negative sign.
-6n + (-12) + 4n = -6n + 4n - 12 = -2n - 12
-2n - 12 is your answer
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The following sequence shown up top is arithmetic sequence
Answer: $0.70
Explanation: see picture
The first thing we must do for this case is to find the relationship between the variables.
We have then:

From here, we clear the value of "Y":


On the other hand we have:

From here, we clear the value of "x":

Then, replacing values we have:

On the other hand:

Finally, the perimeter is given by:

Substituting values we have:

Answer:
the perimeter of ABCD is:
44 units