exam Maths Puzzle Numerical Ability

3/2L=-4m what is L

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exam Other Question

decide whether lnes p1 and p2 are perpendicular:

line p1:y= 3x + 5
line p2: y= 1/3x + 5
Solve by the addition method?

x + 6y = 32
-x + 3y = 13

What is the solution of the system?
(Type an order pair)