exam Maths Puzzle Numerical Ability

What is the graph of the equation 6x2 - 24x - 5y2 - 10y - 11 = 0

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exam Other Question

I have a world problem, not sure if I came up with the right answer. Could you help please. The reciprocal of a number plus the reciprocal of twice the number equals 1/2. Find the number. I have x+2x=1/2 x=1/6 Is this right? find x:

2 sqrt of x-3 = 12