3.
Jen Butler has been pricing Speed-Pass train fares for a group trip to New York. Three adults and to
must pay $113. Two adults and three children must pay $80. Find the price of the adult's ticket and the pri
of a child's ticket.
The price of a child's ticket is $
The price of an adult's ticket is $

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?