Tiles around a pool: Writing expressions

Square tiles are placed around a rectangular pool (in blue). How many of these square tiles are needed? Write an algebraic expression for the number of tiles needed to go around the pool.
How many tiles are needed to go around a pool with dimensions 120-by-150? How about x-by-y?

Guess the equation of the line in y=mx+b form

Type in the equation of the Line provided

Exploring Vertex Form of Quadratics

Move the sliders (a, h, k) to explore how they affect the graph of the parabola, and the equation of the parabola in vertex form.

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