exam Maths Puzzle Numerical Ability

Please help me with this proof.

In the figure, angle NYR and angle RYA form a linear pair, angle AXY and angle AXZ form a linear pair, and angle RYA and angle AXZ are congruent.

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exam Other Question
Two jets leave Denver at 9 a.m. one flying east at a speed 50kmph greater than the other, which is traveling west. At 11 a.m. the plane are 2500 km. apart. Find their speeds. (9 1/2 +16 1/2)squared