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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

Answered by Jules B. • Maths tutor

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You are told that a straight line runs through 2 points: (1,1) and (2,3). What is the equation of the line?

Write 2x^(2) + 9x + 1 in the from a(x+m)^(2) + n, and hence solve 2x^(2) + 9x + 1= 0, leaving your answer in surd form.

Make F the subject of the formula: C= 5(F-32) / 9

Factorise and solve x^2 -8x=15=0

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