Aspotlight at a dance club flashes every 25 seconds. another spotlight flashes every 30 seconds. both lights just flashed . after how many minutes will both lights flash at the same time again?

Can some one me with these questions

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.

Which of the following is the sum of 3 1/6 + 6 3/8?