exam Maths Puzzle Numerical Ability

What is known about the # of solution to a system of m linear equations in n unkowns if "m=n", "m<n" and "m>n"?

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exam Other Question

how would you...
A.) use the distributive property to solve and create a binomial to set up the FOIL method
B.) Solve with the FOIL method
could you break it down step by step?
4x(x^2-2x+5) How long will it take to double my money at 8% interest rate and continuous compounding?