P has coordinates (0, -1) and Q has coordinates (4, 1). a) Find the equation of line PQ. b) P and Q are two vertices of rectangle PQRS. Find the equation of line QR.

a) y = x/2 - 1 b) y = -2x + 9

JB

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A rectangle of perimeter 45cm has sides of length x and x+4. Work out the value of x.


Solve the simultaneous equations: 3x + y = -9, x^2 + 2x - 3 = y


13/2 - 5/3 = ?


Expand x(x+4)