exam Maths Puzzle Numerical Ability

Given f(x)=5x+2 and g(x)=2x+1 find (f-g)(-1) and (fg)(2)

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exam Other Question

A coin collection consisting of nickels, quarters, and half dollars is worth $10.00 There are 6 times as many nickels as quarters and 1 less half dollars than quarters. Find the number of nickels, quarters, and half dollars. How do you simplify a rational problem like this: 2x^2+6x+4/4x^2-12x-16, whats the answer for this problem?