The axis of symmetry for a certain parabola is x= -3. The parabola can be molded by the equation f(x)=4x^2+?x+31 Find the value of ?

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?

I’m confused on how to work the pie charts

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9