exam Maths Puzzle Numerical Ability

Simplify the expression. Write the result using positive exponents only.

5^-1 + 2^-1

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exam Other Question

A sum of money is made up of $5 bills and $10 bills. The total number of $5 bulls is at least 3 less than double the number of $10 bulls. That sum of money is a minimum of $65.

What would that look like as an inequality equation? Find all positive values for k for which each of the following can be factored.

x(squared)+ x-k

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