Carl buys a printer for his office on January 1, 2012 for $15,000. He estimates the machine to have a useful life of 10 years. The residual value of the machine is estimated to be $5,000. What will be the depreciation of the machine per year if the straight line method is used for calculation purposes?

Which of the following would be a correct step in proving that triangle abc is congruent to triangle cda? a. use a protractor to measure the angles and show that all the corresponding angles are equal in measure. this will allow you to prove congruence by aaa. b. show that segment ab is parallel to segment cd and segment ad is parallel to segment cb. this will allow you to prove congruency by asa. c. show that is segment ab is perpendicular to segment ad. this will allow you to prove congruence by sas. d. none of the above.