exam Maths Puzzle Numerical Ability

In which quadrants does the graph of the following inequality lie? 2x - y <= 4

a) I,II only
b) I,II,III only
c) I,III,IV only
d) I,II,III,IV
e) none of these

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exam Other Question

two circles of radius 10 cm are drawn so that their centers are 12 cm apart. The two points of intersection determine a common chord. Find the length of this chord.

thx
log2(3x - 4) = 5

Please show me the steps to get to the answer, which is x = 12

Appreciate it greatly