exam Maths Puzzle Numerical Ability

solve triangle ABC given that a=13 b=14 and c=11. round to the nearest tenth.
please help me figure this out.
i dont know how.
thanks a lot!

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exam Other Question

Sovle each inequality by making a sign graph of the factors. State the solution set in iterval notation and graph it?

5x-x^2<4

Can you please help me sovle this problem? Translate the following statement into an algebraic equation. Let x represent the number. 7 less than 10 times a number is 9 times that same number.