Which should be calculated first to solve this story problem? a bus driver drove a bus 43.9 miles per hour for 5 hours on monday. he drove 47.5 miles per hour for 3 hours on tuesday. how far did the bus driver drive altogether? a. the total number of hours driven b. the total number of miles driven c. the number of miles driven in 5 hours

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?