Which is the constant term of the algebraic expression -2x 2+17-15x+xy

Andy wants to find the distance d across a river. he located points as shown in the figure, then use similar triangles to find that d = 223.5 feet. how can you tell without calculating that he must be wrong? tell what you think he did wrong and correct his error. round your answer to the nearest tenth if necessary. andy must have used the wrong . the distance d is actually feet.

Find the exact value of cos(arcsin( one fourth for full credit, explain your reasoning. (2 points)

Which equation has a graph that is a parabola with a vertex at(-2, 0)