1. Mr. Brock Lee opened a bag full of marbles that contained only purple and yellow marbles. The bag contains 16 marbles. Also on the bag it is advertised that there are three times as many yellow marbles as purple. Write
a system of equations to determine how many purple and yellow marbles are in the bag.
Let x: represent the number of purple marbles.
Lety: represent the number of yellow marbles.

x = 4 , y = 12
x = 12 , y= 4
x = 10 , y = 6
x = 6 , y = 10
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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.