exam Maths Puzzle Numerical Ability

Hi!
Please help me, with this question, the problem says:
Evaluate each of the following if a=3 and b=4
(a-b)^3
Please and Thank You=)

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exam Other Question

Can you please help me solve this: Solve these equations for whatever variable they contain. Be sure to find all the values of the variable that make the equation true.
z^2 - 14z + 2 = 2 - 11z
Hi Can you help me solve the following problem?

Use the given information to find the constant of proportionality.
W is inversely proportional to the square of r. If r = 2, then W = 10.
k =