Answer:
The answer is -3.76923076923 but to the nearest hundredth it is -3.77
Answer:
Step-by-step explanation:
c
S(20)=
5*20-2=100-2=98
Answer:

Step-by-step explanation:
we know that
Using proportion

Answer:
Step-by-step explanation:
Key to this method is remembering that

So, if you divide the coefficient of x by 2 and square it, that will complete the square. With that in mind, things are easy.
6/2 = 3, so add 

So, c=9
Similarly, for the other two,

You don't really have to worry about the sign, since squaring will always make it positive
