Answer:
Los radios de los círculos son 
, 
, 
, respectivamente.
Las áreas de los círculos son 
, 
, 
, respectivamente.
Step-by-step explanation:
La circunferencia (
) se calcula mediante la siguiente fórmula:
(1)
Donde 
es el radio del círculo.
Una vez hallado el radio, se determina el área de la figura geométrica (
) mediante la siguiente fórmula:
(2)
Si conocemos que las circunferencias son 
, 
y 
, respectivamente:
1) Radios de los círculos
, 
, 
, ,
2) Áreas de los círculos
, 
, 
, ,
-1/3x</= -6
/-1/3 /-1/3
x</= +2
x>/=+2
The sign changes because you are dividing by a -
The vertex is when x=-b/2a, which is also the line of symmetry.
in this case, b=6, a=3, so x=-6/6=-1
when x=-1. y=3-6-1=-4
another way to do it is to write the equation into vertex form by making a square:
3x²+6x-1
3(x²+2x-1/3)
3(x²+2x+1-1-1/3))
3(x²+2x+1-4/3))
notice the bold part makes a square:
3(x+1)²-4
Either way,
the vertex is (-1, -4)
the axis of symmetry is x=-1
the coefficient of x² is 3, a positive number, so this parabola opens upward. the function has a minimum value of y=-4
the range is all real number larger than -4
Answer:
Step-by-step explanation:
2x^2-2x-12
This has solutions of x=3 and x= -2
The value of quarters in the bowl on week 1 was &5
