The answer is C. 71. You add up all the numbers to get 355. and then you divide by the amount of numbers there are. there are 5 numbers so you do 355/5 to get 71.
Answer: x=15
Step-by-step explanation: Since 3x+5 is equal to 50, you can write 3x+5=50, and 3x=45, x=15.