exam Maths Puzzle Numerical Ability

decide whether lnes p1 and p2 are perpendicular:

line p1:y= 3x + 5
line p2: y= 1/3x + 5

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exam Other Question

How do I rewrite each equation as a function of x.

-3x + 4y = 11 graph all ages for free admission. you get in free younger than 5 or 62 or older