exam Maths Puzzle Numerical Ability

If planes a and b are distinct planes having points x,y,and z in common, what conclusion can you make about points x,y, and z?

Why?

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exam Other Question

Brandon goes on a ACaub Scout hike and hikes to a waterfall in 3 hours and hikes back along the same route to the compground in 2 hours. If the hiking rate is 1mph faster returning than going, how fast are the boys hiking each way? A plumber needs 3 times as much solid pipe as perforated pipe to lay a drain line 200 feet long. How much solid pipe is needed?