exam Maths Puzzle Numerical Ability

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14 over -5y

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exam Other Question

R(x) = x + 1 / x - 1, if T(x) = R(x), then T(x) =
a. T(x) = 2x / x - 1
b. T(x) - x + 2 / x - 1
c. T(x) = x + 2 / x + 1
d. T(x) = 2x / x + 1
Determine which two equations represent perpendicular lines.
y = 4/7x-3
y = 3x-4/7
y =-1/3x+4/7
y =1/3x-3 4/7