In a proof to show two triangles are congruent if a given is PR ⟂ CK, which of the following statements most likely will be used within the proof? PR and CK are congruent.
PR and CK are similar.
PR and CK form acute angles.
PR and CK form right angles.

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Identify the graph of y = ln x + 1.