exam Maths Puzzle Numerical Ability

Please simplify and multiply the square root. Thanks!

(√18+√8)(√18-√8)

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exam Other Question

I need to sketch the following problem: y= -square root x+2 -3. Then find x-intercept, y intercept, f(14) and x when f(x)= -6. Solve each of the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.

x + 5y = 10
-2x - 10y = -20