Answer:
{-12,0}
Step-by-step explanation:
first to solve this can collect like terms and add 
 X² +12x=0
and solve it by factorization method 
 X² +12x=0
 x(x+12)=0
it means x multiplied by x = X² then x multiplied by 12 = 12x 
 so this means x or (x+12) equals to zero
 x=0 and (x+12)=0
 x+12=0
 x=-12 
so the solution set is {-12,0}
 but can also be done by formula method 
 
        
             
        
        
        
Answer:
<h2>Fraction</h2>
Step-by-step explanation:
The definition of a rational number is that is can be written as a fraction. Other irrational numbers, such as pi, cannot be.
 
        
             
        
        
        
Answer:
100
Step-by-step explanation:
 
        
             
        
        
        
To find Tim's overall score, first we must find the sum of his scores from quizzes, notes, and tests.
Hence, we have
quizzes = (5 + 2 + 9) = 16/3
notes = (3 + 9 + 5)/3 = 17/3
tests = (9 + 5 + 9)/3 = 23/3
Now, we must consider the percentage that these tests contribute to his overall score. So we have the following:
quizzes = 0.5(16)/3 = 8/3
notes = 0.2(17)/3 = 3.4/3
tests = 0.3(23)/3 = 6.9/3
We now add these to find the overall score which is 8 /3+ 3.4/3 + 6.9/3 = 18.3/3 = 6.1.
Thus, Tim's overall score is 6.1.
Answer: 6.1
        
             
        
        
        
Answer:
17/36
Step-by-step explanation:
IT simplifies to 17/36