What is 28 marks out of 56 as a percentage

Math question: Find the absolute extrema of the function f(x) = x^2 - 4x + 5 on the interval [0,3].

Question: For the parabola defined by the equation y = x^2, what are the x-intercepts and the vertex point?

Math question: If triangle ABC is congruent to triangle DEF, and triangle DEF is congruent to triangle XYZ, what can we say about triangle ABC and triangle XYZ?