Answer:
B, E
Step-by-step explanation:
Answer A is wrong: 5 + 2 + x
Answer C is wrong: 5 + x + x
Answer D is wrong: 5 + x*x
F is wrong, because a product is the result of multiplying.
 
        
                    
             
        
        
        
Because 12 + 3 is not equal to 16...
        
                    
             
        
        
        
Answer:
B) 0.02
Step-by-step explanation:
<u>Use the Binomial Theorem</u>

We have the probability of success,  , and the probability of failure,
, and the probability of failure,  . The binomial coefficient,
. The binomial coefficient,  , represents the amount of possible combinations that
, represents the amount of possible combinations that  items can be chosen out of
 items can be chosen out of  items, with its respective formula
 items, with its respective formula  .
.
Hence, the best choice for the probability that 4 students chosen at random from the class of 30 that want the next test to be on Monday will be option B, 0.02
 
        
             
        
        
        
Answer:
11.18
Step-by-step explanation:
 
        
                    
             
        
        
        
-16t^2+400=0
16t^2=400
take square root on both sides.

4t=20
t=20/4
t=5