how much would sally have left if she gave 130 lollipops away for Valentine's day if there was 28 kids in her class how many lollipops would she have left giving each kid 3?​

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)