exam Maths Puzzle Numerical Ability

Please help to graph :

4x < -12
2x + y > or equal to -4

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exam Other Question

Diameter AB of circle o is 21 inches. Line AB is extended through B to a point C and tangent CD is drawn, meeting the circle at D. CD is 6 inches longer than BC.

a) Let x represent BC. Express CD and CA in terms of x.

B) Find BC solve for v:

z = xy over v^2