On tuesday and wednesday, cab fare cost $7.75 total. on monday and thursday, cab fare cost $6.30 on each day. on friday, cab fare cost $7.00. what was the average daily cost?

To get the average cab fare cost reported for five, we sum up all the cost first. 
For Tuesday and Wednesday, the total cost would be 2($7.75) which is equal to $15.5. For Monday and Thursday, the total would be $12.6. Then lastly for Friday that would be $7.0. Adding up all the costs and dividing the sum by 5 (number of days) the answer would be $7.02. 
Thus, the average cab fare cost is $7.02.