If x, y and z are real numbers such that: x + y + z = 5 and xy + yz
+ zx = 3. What is the largest value that any of the numbers can
Find all the solutions to the this equation.
Four vehicles travelled on a road. What can you deduce from the times that they met?
The illustration shows the graphs of twelve functions. Three of
them have equations
$y = x^2$
$x = y^2$
$x = -y^2 + 2$
Use a graphic calculator or a graph drawing program to sketch
these three graphs and then to locate them in this illustration.
Use the clues given in this information to help you to find the
equations of all the other graphs and to draw the pattern of 12
graphs for yourself. For your solution send in the equations you
have found with an explanation of how you did it.