Book Maths Puzzle Algebra

The longer leg of a right triangle is 3 inches longer than x, the length of the shorter leg. The hypotenuse is 15 inches long. The following equation shows the relationship between the sides of the triangle.

x^2+(x+3)^2=225

What is the length of the shorter leg?

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Book Other Question

Chris has determined that the flight of a golf ball hit with a 9-iron can be defined by h= -0.012t^2 + 1.2t, where t is time in seconds and h is height in meters of the ball. Chris The volume of a pyramid with a square base is 120 cubic units. If the base has a permeter of 24 units, what is the height of the pyramid?