9024152 Would be your answer!
Answer:
or 
Step-by-step explanation:
we know that
The general equation of a horizontal parabola open to the left is equal to

where
(h,k) is the vertex of the parabola
p is the focal distance (distance from the vertex to the focus)
In this problem we have
The vertex is the point (2,-4)
so

The Focus is the point F(1,-4)
so
the focal distance p=2-1=1 ---> distance from the vertex to the focus
substitute in the formula


Answer:
0
Step-by-step explanation:
2+(-2) is basically 2-2 which is 0
N = 20, r = 15;
n C r = ( n * ( n - 1) ( n - 2 ) ... ( n - r + 1 )) / r ! =
20 C 15 = (20 * 19 * 18 * 17 ......8 * 7 * 6) / (15 * 14 * 13 ...* 5 * 4 * 3 * 2 * 1) =
= 15,504
Answer:
They can choose 15 questions in 15,504 ways.
Answer: 
Step-by-step explanation:
The point-slope form of the equation of the line is:

Where "m" is the slope of the line and
is a point of the line.
You know the value of the slope and you also know a point of the line, then you need to substitute values into
.
Therefore, you get that the equation of this line in point-slope form is:
