C. A four-sided field needs to be fenced. Two sides are each b feet long. The length of the third side is 3 feet less than 7 times the fourth side. If the length of the fourth side is represented by m, write an algebraic expression that represents the length of the fencing needed.

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)