Answer:
30
Step-by-step explanation:
27, 28, 28, 29, 29, 29, 30, 30, 30, 31, 31, 31, 33, 34
Continuously cross one off from each side and get 30 and 30. The mean of these is 30.
Answer 9
Step-by-step explanation:
Factor left sides of the equation
(x-1)(x+9) = 0
Set factor equal to 0
x-1 = 0 or x+9 = 0
x= 1 or x= -9
I hope that's help and have sweet dream !