Answer:
53\40
Step-by-step explanation:
27-13=14
39+1=40 14-1=13 13+40=53
53\40
Answer:
(8,2)
Step-by-step explanation:
The solution is where the two graphs intersect.
The two graphs intersect at x=8 and y=2
(8,2)
Answer: a associative
b identity
c associative
please mark as brainliest please
Answer:
a) 
b) 
c) 
Step-by-step explanation:
Part a
represent the significance level
df =15
Since is a right tailed test the critical value is given by:

And we can use the following excel code to find it: "=T.INV(0.9,15)"
Part b
represent the significance level
n=20 represent the sample size
First we need to find the degrees of freedom given by:

Since is a left tailed test the critical value is given by:

And we can use the following excel code to find it: "=T.INV(0.1,19)"
Part c
represent the significance level
n=18 represent the sample size
First we need to find the degrees of freedom given by:

The value of
and 
Since is a two tailed tailed we have two critical values is given by:

And we can use the following excel code to find it: "=T.INV(0.025,17)"