Replace all variables in the given equation with the given values.

Answer: 37
The mean is 10
To find the mean you add up all of the numbers (70) and then divide it by how many number there are. so in this question there are 7 numbers. 70/7= 10
I dont know anything about these set of drivers
-12/13, as you make it into an improper fraction so 12×-1+1=13 so the 13 goes over the 12 to get -13/12 than you flip it to get the reciprocal with is -12/13