exam Maths Puzzle Numerical Ability

find the value of k so that the line containing the points (-4,k) and (2,8) is perpendicular to the line containing the points (8,-3) and (-6,9).

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exam Other Question

A theater has 650 seats. After one sell-out performance, the theater made $11,600. If orchestra seats cost $20 each and balcony seats cost $12, how many orchestra and balcony seats are there in the theater? find two factors of 35 with a difference of 2