exam Maths Puzzle Numerical Ability

decide whether lines p1 and p2 are perpendicular:

line p1:x+8y=-4
line p2:4x-2y=10

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exam Other Question

The perimeter of a yard is 130 ft. IF the length is 10 less than 2 times the width, write an equation for the perimeter .... ? Solve each equation. If a solution is extraneous, so indicate.
(5)/(2z+z-3)-(2)/(2z+3)=(z+1)/(z-1)-(1)