Answer:
The principal square root of -4 is 2i.
Step-by-step explanation:
 = 2i
 = 2i
We have the following steps to get the answer:
Applying radical rule 
We get 
As per imaginary rule we know that 
= 
Now 
Hence, the answer is 2i.
 
        
             
        
        
        
Answer: -7/5
Step-by-step explanation:
-4(1/5)⋅(1/3)
Convert -4(1/5) to an improper fraction.
A mixed number is an addition of its whole and fractional parts.
 − (4 +1/5) ⋅(1/3)
  Add 4 and 1/5
-21/5  ⋅ 1/3
Cancel the common factor of 3.
Move the leading negative in − 21
/5 into the numerator.
 −21/5 ⋅ 1/3
 Factor 3 out of −21.
3 (−7)/5 ⋅ 3
/1
Cancel the common factor.
Rewrite the expression.
−7
/5
 
        
                    
             
        
        
        
(4 + 9 + 16 / 4) - 8 - (3 * 5)
(29 / 4) - 8 - (3 * 5) | Add up the numbers on left side.
(7.25) - 8 - (15) | Divide 29 by 4 and multiply 3 and 5.
-0.75 - (15) | Subtract 8 from 7.25
Final answer: -15.75
        
                    
             
        
        
        
Answer:
The number of miles traveled for x hours
Step-by-step explanation: