book Maths Puzzle Numerical Ability

Find the equation, in standard form, with all integer coefficients, of the line perpendicular to 3x-4y=9 and passing through (-2,-1)

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book Other Question

The sides of the triangle are 6,7,and x. What is the largest value that could be the area of such a triangle? the nth term of a different sequence is n-2/n2 write the first three terms of this sequence??