exam Maths Puzzle Numerical Ability

Graph each inequality.

2x + 5y greater than or equal to 10

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exam Other Question

Convert this inequality into an equation by adding a slack variable.
2x1 + 4x2 + 3x3 ≤ 100

Is this correct? 2x1 + 4x2 + 3x3 s1 = 100

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show that ((( f(x)=3x-4 and g(x)=(x+4)/3 ))) are inverses