A person plans to row a boat from point A on one side of a straight river to a point B on the other side, as shown. All distances are measured in feet. rowacross Suppose the river is 300 feet wide and the person can row at a speed of 5 feet per second. Express the time needed for the person to row from point A to point B as a function of x.

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Demonstrate the proof of your new polynomial identity through an algebraic proof and a numerical proof in an engaging way! make it so the whole world wants to purchase your polynomial identity and can't imagine living without it! you must: label and display your new polynomial identity prove that it is true through an algebraic proof, identifying each step demonstrate that your polynomial identity works on numerical relationships create your own using the columns below. see what happens when different binomials or trinomials are combined. square one factor from column a and add it to one factor from column b to develop your own identity. column a column b (x − y) (x2 + 2xy + y2) (x + y) (x2 − 2xy + y2) (y + x) (ax + b) (y − x) (cy + d)

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective