exam Maths Puzzle Numerical Ability

how do i determine whether the graphs of the equation are perpendicular lines?
4y=x+5
9y+3x=2

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exam Other Question

#9

Identify x = 4sint

y = 5cost



a) circle

b) parabola

c) ellipse

d) hyperbola

e) none of these
factor each expression:


x^3 + 64