exam Maths Puzzle Numerical Ability

Find the slope of the line passing through the points (1, 3) and (1, -1).
-4
0
Undefined
1

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write a cost function to determine the amount a customer needing a repair that takes 1.5 hours and requires a $103 part will be charged.

An appliance repair service charges $50 Can someone please help me out with this: I am supposed to find the length x. Express your answer in simplified radical form. the triangle is 51 ft on one side, 45 ft on the other side, then there is x.