exam
Maths Puzzle
Numerical Ability
Write (9/4)^-1 as an exponent
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exam Other Question
Determine which two equations represent perpendicular lines.
(1) y = 4x-6
(2) y = 1/4x+6
(3) y = -1/4x+6
(4) y = 1/4x-6
3^x=1/27
25^2x=5^x+6
6^x+1=36^x-1
49^x-2=7 root 7