Graphically: graph your equations and look for the intersections (these are your answers).
Algebraically: set your equations into y = format (below) and plug your values into the quadratic formula.
y = ax^2 + bx + c
(example: y = 2x^2 + 5x + 6; a = 2, b = 5, c = 6)
X> 5 is the correct answer
4 green blocks should be added because there are already 4 blocks between the 1 blue and 3 yellow. Adding the 4 green blocks would make the total number of blocks 8
Order of operations (pemdas). so its just 100 because you multiply 10x10 first