O/A level math physics chemistry

A wire of length x meter is bent to make a square of area 64m². Find length of wire?

What is lowest value of f(x) = ( x -9 )² + 12 ?

Which is the 5th term of (1 - 2x )⁸ ?

The smallest square number of inequality 4x + 3 < 7x - 21 ?

If
X = 100⁰ + 30⁰ + 5⁰,
what is X ?

If |3x -6| > 12 , what are the values of x?

Imaginary part of complex number -3i + 5/3 is.... ?

A problem from trigonometry O level Math Past papers..

If scale on map is 1 : 400, find actual area of a plot whose area on map is 5cm²

Unit vector of vector 2i - 2j + k is......