Answer:
The correct answer is option C.
Step-by-step explanation:
Let the number be x.
The square of a number exceeds that number by 12 .Mathematically can be written as:


Using middle term splitting to factorize the expression:



The two possible solutions are :
1) (x+3)=0
x = -3
2) (x-4)=0
x = 4
The answer to your question will be D.
A variable is a letter that replaces an unknown number.
The mean of the students scores is 81.3, the median is 80.
If Ms.Mosher adds 5 bonus points to each student, the mean and median will both increase by 5 of the six student’s scores!