Answer:
<em>0.615</em>
Step-by-step explanation:
The frequency table is attached below.
We have to calculate, the probability that the student preferred morning classes given he or she is a junior. 
i.e 
We know that,

So,

Putting the values from the table,

 
        
             
        
        
        
Answer:
-6x - y = 27 =  x=
−1
/6
y+
−9
/2
3x + 8y = 9 =  x=
−8
/3
y+3
Step-by-step explanation:
be more specific and space out the equations next time please, i didn't know what you wanted me to do. but i solved them.
brainliest please?
 
        
             
        
        
        
Answer:A. 10x. B. -2yz
Step-by-step explanation:
A. 4x+7x=11x
11x+(-x) = 11x-1x=10x
B. -5yz+yz=-4yz
-4yz+2yz=-2yz
 
        
             
        
        
        
Answer:
a3+13a 
Step-by-step explanation:
sorry I don't know how to solve this
 
        
                    
             
        
        
        
<span> To find 55% of 120 books, multiply 120 x .55  
 Then add that answer to the original 120.</span>
120 + 55% = 186