exam Maths Puzzle Numerical Ability

Both Gaussian Elimination and Cramer's rule are used for solving linear systems. If you need to solve large systems with more that three variables, which method is more effieient a

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exam Other Question

Consider the following total variable cost function give as
VC= 150Q-10Q^2+0.5Q^3
a. What is the output level of Q and at which point does the avc takes on the minimum value
b.
two scales used for measuring temprature are kelvin scale and the celsius scale. A temperature in degrees kelvin is about 273 degrees greater than a temperature in degrees celsius.