Answer:
94
Step-by-step explanation:
Average = Total / Number of Data
You have a total of 280 points after 4 quizzes.
4+4=8 quizzes in total
Total you need for average to be 82
Number of points you need to hit required:
You need 376 points in total for the next 4 quizzes.
You need an average of 94 points on the next 4 quizzes.
Answer:
The correct option is (A).
Step-by-step explanation:
If the reduced row echelon form of the coefficient matrix of a linear system of equations in four different variables has a pivot, i.e. 1, in each column, then the reduced row echelon form of the coefficient matrix is say A is an identity matrix, here I₄, since there are 4 variables.
Then the corresponding augmented matrix [ A|B] , where the matrix is the representation of the linear system is AX = B, must be:
Now the given linear system is consistent as the right most column of the augmented matrix is a linear combination of the columns of A as the reduced row echelon form of A has a pivot in each column.
Thus, the correct option is (A).