The vertex of this parabola is at (2,-4). which of the following could be its equation?
a)y=2(x-2)2 +4
b)y=2(x-2)2 -4
c)y=2(y-4)2 +2
dy=2(y+4)2 +2

Which graph corresponds to the function f(x) = x2 + 4x – 1?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?