Answer:
And we can find the nnumber of deviations from the mean for each limit given:
So we are 3 deviation from the mean and using the empirical rule we know that within 3 deviations from the mean we have 99.7% of the values
Step-by-step explanation:
Let X the random variable that represent the amount of time it takes him to arrive, and for this case we know the distribution for X is given by:
Where 
and 
We want to find this probability:
And we can use the z score formula given by:
And we can find the nnumber of deviations from the mean for each limit given:
So we are 3 deviation from the mean and using the empirical rule we know that within 3 deviations from the mean we have 99.7% of the values
The cost of one adult ticket is $8 and cost of one child ticket is $8.
Step-by-step explanation:
Let,
Cost of one adult ticket = x
Cost of one child ticket = y
According to given statement;
3x+y=32 Eqn 1
7x+2y=72 Eqn 2
Multiplying Eqn 1 by 2
Subtracting Eqn 3 from Eqn 2
Putting x=8 in Eqn 1
The cost of one adult ticket is $8 and cost of one child ticket is $8.
Keywords: linear equation, elimination method
Learn more about linear equations at:
#LearnwithBrainly
???????????????????????????
Answer: 
Step-by-step explanation:
From the given graph we can see that it is passing through origin (0,0) and (1,4).
The equation of a line passing through 
and 
is given by :-
Now, The equation of a line passing through (0,0) and (1,4) is given by :-
