exam Maths Puzzle Numerical Ability

Graph each of the following inequalities.

4x + y _> 4

x
GRAPH
y

I do not understand this graph stuff there is a graph on the page inbetween the X AND Y where it says GRA

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exam Other Question

Suppose that the equation p(x) = -2x^2 + 280x - 1000, where x represents the number of items sold, describes the profit function for a certain business. How many itmes should be sold to maximize the profit? Is sqrt (x^2) = x an identity (true for all values of x)?

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