exam Maths Puzzle Numerical Ability

SOLVE THE FOLLOWING SYSTEM OF LINEAT INEQUALITIES BY GRAPHING
X-2Y>4
X<4 THERE IS A LINE UNDER THE GREATER AND LESSER SIGN..THANKS SO MUCH IN ADVANCE

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exam Other Question

The revenue of selling x coffee makers is given by R = x(43-0.2x)dollars. The cost of each coffee maker is $19.00 Hw many coffee makers must be sold to achieve a profit of at least How would you COMPLETELY FACTOR: a^2 - 10ab + 3b^2?