how to incorporate the mathematical practice standards and constructivism into an elementary classroom

Which of these tools or constructions is used to inscribe a hexagon inside a circle?

If f(x) = 4 - x2 and g(x) = 6x, which expression is equivalent to (g-f)(3)? 06-3-(4 + 3)2 06-3-(4-33 6(3) - 4 +32 6(3) -4 -32

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585