Answer:
a. square root of 5
b. square root of 13
c. 9
d. 13
Step-by-step explanation:
 
        
             
        
        
        
Answer:
(x-5)(x+6)=0
Step-by-step explanation:
hehe i doing the smae unit rn. 
if a=1 (which it does do ac factoring)
you need two numbers that multiply to -30 and add to 1. those numbers  are 5 and -6.
substitute 1x for -5x + 6x.
group the numbers into pairs and find their gcf's
x(x-5)    6(x-5)
since the parenthesis r the same yo only need one. Now you need to put x and 6 in a parenthesis. 
FINAL: (x-5)(x+6) hope this helps
 
        
             
        
        
        
Answer: B I think
Step-by-step explanation: hope it helps
 
        
             
        
        
        
Answer:
10 is unbiased 
11 is biased
Step-by-step explanation:
10 is unbiased
11 is biased
Have an amazing day!
PLEASE RATE!!
 
        
                    
             
        
        
        
Answer: 20
Step-by-step explanation: there are 20 boys