exam Maths Puzzle Numerical Ability

The sales tax is $49 for a dining room table that costs $1225. Find the sales tax rate?

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exam Other Question

i AM HAVING PROBLEMS WITH THIS
Simplify
sqaure root7(9sqaure root2-3sqaure root7)

Thank you Solve by substitution,state whether it is independent,inconsistent,or dependent.;
x - y = 3
3x -2y = 3