exam Maths Puzzle Numerical Ability

what is T-kPV solve for P
what is E=k+p solve for p
what is y=mx+b solve for b
and finally what is ax+by=c for x

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exam Other Question

can someone please help me with this problem:

Complete the square and write the equation in standard form. Then give the center and radius of the circle.

x^2^+ y^2 - 2x - 4y - 4 = 0
Question 72 on page 63
Represent each quantity with a real number.
A country exported $60,000,000 less than it imported, creating a negative balance.