exam Maths Puzzle Numerical Ability

x=-3
y=2x + 1

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exam Other Question

Solve for x: log(z,8) = -3

Simplify:(( log(5,(log(2,32) )) I need to check this answer...In a parallelogram, the ratio of a side to its altitude is 2:1. If the Area is 800sq', find the altitude. Would it be 20'?