Get into form a(x-h)²+k
complete the square
-3x²-18x-31
group x terms
(-3x²-18x)-31
undistribute the -3
-3(x²+6x)-31
take 1/2 of the linear coefient (6) and squaer it
6/2=3, 3²=9
add positive and negative of it inside parenthasees
-3(x²+6x+9-9)-31
complete the square
-3((x+3)²-9)-31
expand
-3(x+3)²+27-31
-3(x+3)²-4 is vertex form
Well first the formula for finding exterior angles is (n-2)180
n is the number of angles, so if u have fifteen sides you do (15-2)180
13 x 180 = 2340
Answer: In explanation
Step-by-step explanation:
1. 135 - 50x
2. $15
3. $0
I hope this helped!
Answer:
binomial
Step-by-step explanation:
a monomial has 1 term
a binomial has 2 terms
a trinomial has 3 terms
2x + y has 2 terms and so is a binomial
The answer is A because Alon could have rotated the figure and discovered that they are congruent