exam Maths Puzzle Numerical Ability

show that a/(b+c) + b/(c+a) +c/(a+b) > 3/2

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exam Other Question

Polynomial function:
a. List all possible zeros
b. find all rational zeros
c. list all factors!

f(x) = x^3 + 5x^2 + 2x -8

A bicycle wheel of diameter 30 inches is spinning at a rate of 60rpm. What is the exact value of the angular velocity of the wheel in rad/min?

What is the linear speed of the bicycle in the previous problem to the nearest mile per hour?