55+8.5x=123
Let x equal the number of days she rented the bike.
Answer:
The mean of the total number of students is 85.5
Step-by-step explanation:
REcall that given n data points, the mean is given by
.
Let us number the students of the 24 students' class from 1 to 24 and the let us number the students of the other class from 25 to 47.
The question is to find the following
REcall the following
Then, from this equations we can deduce that
Therefore,
y = 42°
Because the angle at the side of right angle will also be right angle or 90°
Sum of all angles of a triangle = 180°.
So, 48° + 90° + y = 180°
=> 138° + y = 180°
=> y = 180° - 138°
=> y = 42°
I need the graph to answer tge question
If I understood your problem, you want to calculate the sum of the squared deviations from the sample. If so the formula of the St. Deviation is:
₋
s =√[Σ(xi - x)²/(n-1)], with n = sample size
₋
s² =Σ(xi - x)²/(n-1)
4² = Σ(xi - x)²/(20-1) = Σ(xi - x)²/(20-1)
16 = Σ(xi - x)²/(19)
and Σ(xi - x)² = (16).(19) = 304