Take  the letter out  and replace it with the number that has the exact letter like x-10.
 
        
             
        
        
        
Log=13
t=4
So, this is because they already given you t because the four is on front of it that gives you your value. From there you will proceed to j7st do the math in your parentheses. You should get log=(1) & log=(13) because 1 times anything is that number just use the inverse of each would be eachother. So, 1x13 is the same as 13x1
        
                    
             
        
        
        
let l = lance, and a = alex. 
so: l + a = 70
and l = 4a
Putting the value for l in the first equation:
4a +a = 70
5a = 70
a = 14. 
So Alex has 14 pencils. And Lance has (70-14) 56 pencils. 
And if each child gets half of Alex' pencils, then each child will have 7 pencils. 
 
        
             
        
        
        
The answer is (D) or 1728 In³
        
                    
             
        
        
        
Answer:
response variable- time required for water to turn to ice
control group- second freezer
explanatory variable- new formula
Step-by-step explanation: