A = 2
b = 2
c = -4
"a" is greater than zero so the vertex is a minimum point and the graph is concave up.
The (x,y) point of the vertex is usually designated by the letters (h, k)
The "x" position (or "h") is calculated with this formula:
h = -b / 2a
h = -2 / 4
h = -1 / 2
"k" is calculated with this equation:
k = ah^2 + bh +c
k =(2*-1 / 2 * -1 / 2) + (2 * -1 / 2) + -4
k = (1 / 2) - 1 -4
k = -4.5
so the vertex is at point (-.5, -4.5)
Source:
http://www.1728.org/quadr3.htm
Answer:
s=25
Step-by-step explanation:
So get the probability of Ellen that she get at least 2 correct answer by guessing in a quiz that has 4 multiple choices and based on my calculation and analyzing the problem i came up with a solution and got an answer of 0.367, I hope you are satisfied with my answer
Substitution is plugging one equation into the other.
Elimination is where you eliminate one equation.
Graphing is when you graph the equations and see where they overlap.