Scientific discoveries can be made through observations that do not necessarily follow all of the steps of the scientific method.

Lisette takes an ela exam and got 16 out of 27 questions correct. what percentage of the questions did lisette get correct?

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.

Factor these polynomials and explain how 1. 12x - 3x^2 2. 20 - 240x^2