exam Maths Puzzle Numerical Ability

Graph each of the following inequalities.
4x + y ≥ 4

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exam Other Question

change to polar form & multiply or divide

-4i/sq. root 3 +i i would also like help with this please
Write an equation in slope-intercept form that satisfies each condition.
slope -1/2,passes through (2,-3)

i did it like
-3=-1/2(2)-b
but i dont think thats right please help