Answer:
after five hours,
Step-by-step explanation:
I do not know if that is right hope that helps
Answer: 4×15= 60
Step-by-step explanation:
60 is 15 times as many as 4. This means that 15 is multiplied by 4 to get 60. This will be :
4×15= 60.
The other options such as 60÷15=4, 15+4= 60, 60÷4=15 and 60-15= 4 doesn't explain the question given. 60-15 is not 4 likewise 15+4 isn't 60. For the other options, the question isn't talking about division but multiplication.
Given
consider substituting 
to get a proper quadratic equation,
Solve for 
; we can factorize to get
Solve for 
:
The first equation has no real solution, since 
for all non-zero . Proceeding with the second equation, we get
If we want to find all complex solutions, we take 
so that the first equation above would have led us to
Answer:
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Step-by-step explanation:
