the vertex of the parabola below is at the point (4 -1). which of the equations below could be the one for this parabola A. x=-2(y+1)^2+4 B. y=-2(x-4)^2-1 C. X=2(y-4)^2-1 D. x=2(y+1)^2+4

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

What is the sum of these mixed numbers 4 2/3+ 3 1/9