exam Maths Puzzle Numerical Ability

I need to ask another question...
Graph the conic. Identify the center, vertices, foci, the equations of the asymptotes (if any) and the eccentricity.
a. 25x^2=9y^2-100x+54y-4

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exam Other Question

The diameter AB is equal to the sum of the six smaller diameters. What is the differences in the number of the units between the circumference of the large circle and the combined circumferences of the six smaller circles? Explain in detal. - 1_ x+6<10
3