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Write an equation and solve

1. After a car had increased its rate of speed by 21 km/h, it was traveling 60 km/h. What was it original rate of speed?
2. During a charity drive, the senior class raised $85 more than twice the amount raised by the freshman class. The senior class raised $555. How much did the freshman class raise?
3. Nine less than five times a number equals 71. Find the number.
4. Asa has one piece of wire that is 3m+5 inches long and another piece of wire that is 4m-2 inches long. Write and simplify an expression for the total number of inches of wire.