exam Maths Puzzle Numerical Ability

what is the answer to v squared -9 over 25

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exam Other Question

Given f(x) = �5x � 3, find f(a � 2).

Can someone help me out with this?

thanks 2 studants have 920$ altogether. HOw much does each have if 5/7 of the sum of the first one is equal to 3/5 of the sum of money of the second one?