Answer:
The deep body temperature of a healthy person is 310.15 K
Step-by-step explanation:
The formula we are going to use is  
 
We know that the deep body temperature is 37°C, putting this value into the formula we have that 
 
        
             
        
        
        
Solution: The missing reason in Step 8 is substitution of  .
.
Explanation:
The given steps are used to prove the formula for law of cosines.
From step 5 it is noticed that our equation is
  ..... (1)
      ..... (1)
From step 7 it is noticed that the value of  is
 is  .
.
So by substituting  for
 for  in equation (1) we get the equation of step 8, i.e.,
 in equation (1) we get the equation of step 8, i.e.,

Hence, the missing reason in Step 8 is substitution of  .
.
 
        
                    
             
        
        
        
First replace y with 15.
1/5x-10=30
Then just solve from there.
x=200
        
                    
             
        
        
        
Answer:
x >_ 1
Step-by-step explanation:
Solving an inequality is a lot like solving an equation. Just pretend the inequality symbol is an equal sign!
(also i wont be using the _ or equal to symbol because I'm too lazy, so you'll get >_ or <_ for those, sorry)
8 + 4x >_ 12
-8             -8
4x >_ 4
/4       /4
x >_ 1