Asquare mar has a perimeter of (12x-32) what is an expression in simplest form that represents the side length (in feet) of the mat

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Evaluate the expression. (9 + 5)(3 + 2)0

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.