exam Maths Puzzle Numerical Ability

The lengths of the sides of a non-right triangle are 17 inches, 9 inches, and 12 inches. Find the area of the triangle. Round to the nearest tenth.

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-4(2x-3)=8x+5 ON AN AIRPLANE THAT IS 2/3 FULL, 20% ARE GIRLS, ONE FOURTH OF PASSENGERS ARE WOMEN, 1/8 OF THE PASSENGERS ARE BOYS AND THERE ARE 68 MEN. HOW MANY SEATS ARE THERE ON THE PLANE?