Answer: 90º
Step-by-step explanation: complimentary angles are either of the two angles whose sum is 90º
 
        
             
        
        
        
Hello from MrBillDoesMath!
Answer:
12/5
Discussion:
Note that 10 is a common denominator of both denominators: 
9/5 = (9*2)/(5*2) = 18/10
- ( -6/10) = + (6/10)
So the original problem is equivalent to
18/10 + 6/10 = 
(18 +6)/10 = 
24/10 = 
(2*12)/ (2*5)   =>       cancelling the common factor "2"
12/5 = 
2 and 2 fifths = 
22/5            (though this looks like (22)/5!)
Thank you,
MrB
 
        
             
        
        
        
Answer:
true
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
0.0000
Unusual
Step-by-step explanation:
Given that a tobacco company claims that the amount of nicotine in its cigarettes is a random variable with mean 2.2 mg and standard deviation .3 mg. 
i.e. population parameters are

The approximate probability that the sample meanwould have been as high or higher than 3.1 

=0.0000
 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
Not 100% sure, been a while since i did this stuff but i think A is correct