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Calculate the area of the trapezoid, which is not drawn to scale.

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?