exam Maths Puzzle Numerical Ability

A=B+3(4-C)

B=5
C=2

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exam Other Question

I do not understand these problems at all, could someone please help me?

The following equation represents an ellipse. True or False?
(x-3)^2/1 + (y+1)^2/25 hey,
please i have a question on one of my word problem,

what is the smallest possible total of a number and its square?

i will be waiting for the answer,

and thank you