x=6, add thirty to both sides 6 squared is 36, plus six is 42
 
        
             
        
        
        
Answer:
7/10 OR 0.7
Step-by-step explanation:
10,12,14,15,16,18,20
 
        
             
        
        
        
Question:
Devin is having trouble with his assignment. His shown work is as follows: 

However, this answer does not match the answer that his teacher gives him. 
What is Devin’s mistake?
Answer:
See Explanation Below
Step-by-step explanation:
Given

Required
Spot and correct the mistake
Devin's mistake is in between step 1 and step 2.
To divide fractions;
You start by converting the division sign to multiplication sign.
But when doing this, you have to consider that the denominator and numerator of the second fraction will swap positions.
So, Devin's mistake is at

Because he didn't swap the position of 5 and 3 in the second fraction when changing the division to multiplication.
His calculation should be as follows


If he wishes to leave his answer in decimal, it'll be

 
        
             
        
        
        
The digits base is 7 then we should convert them into base 6.
The exponent or power to which a base must be raised to yield a given number. Expressed mathematically, x is the logarithm of n to the base b if bx = n, in which case one writes x = logbn.
Here the conclusion is that there are many bases in the mathematics so what will happen is that we should convert these bases. For example, we have to convert base 10 of a number which is called decimal number can be converted into binary number whose base is 2 and after then if the digits base is 7 then we should convert them into base 6.
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