Solve the simultaneous equations: x2 + y2 = 20, 3x=2-y
x = -4/5 or 2
y = 22/5 or -4
IA
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(a)Show that the lines y=3x+7 and 2y–6x=8 are parallel. [3 marks] (b) Is the point (–5, –6) above, below or on the line y = 3x + 7 ? Do not use a graphical method. [2 marks] [Total 5 marks]
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Simplify sqrt(12)