Distribute the 4.
8 + 12c = 56
Subtract 8.
12c = 48
c = 4

notice your vertex there, 1, -3
h = 1
k = -3
Answer: The first term is 
Step-by-step explanation:
1. To rewrite the given polynomial in descending order, you must see the exponent of each variable of the terms. Then, you must arrange the terms from bigger to smaller.
2. Keeping this on mind, you have:

3. As you can see, the first term is: 
Answer:
A
Then that gives you -n=2
Than u multiply it by -1 to get rid of the negative n, giving you the final answer of n=-2
Step-by-step explanation:
Step 1:
For a number, let us use n.
We know the equation equals 54, and we also know that 54 is sixteen less than n. Thus, we can make the equation:

Step 2:
Now, to solve the equation, we simply have to get the integers to one side. To do this, add 16 to both sides of the equal sign. Our answer is:

Hope this helps.