exam Maths Puzzle Numerical Ability

Please help me solve this equation: one leg of a right triangle is 3 cm more than half the length of the other eg. the area of the triangle is 54cm^2. how long are each of the legs?

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exam Other Question

28) Geometry. For the floor plans given in Exercise 27 (p 627, but the necessary information to solve the problem is included here), determine whether the side through the points in math class your average grade for the first three tests is 81. You want to raise your final average to 85. What grade do you need on the final, the only remaing test in term?