What is the first step when rewriting y = 3x2 + 9x – 18 in the form y = a(x – h)2 + k? 3 must be factored from 3x2 + 9x x must be factored from 3x2 + 9x 9 must be factored from 9x – 18 3 must be factored from 3x2 – 18

Solve the equation for b: a= (1/2)(b)(h)

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.

How does percent markup and percent discount relate to percent of change?