Use row reduction to solve the system of equations.

Step-by-step explanation:

The given systems of equations is

The augmented matrix is

.

We perform the following row operations to reduce the matrix to reduced row echelon form using row 1 as our pivot row.

Next, we perform the following row operations using row 2 as our pivot row to obtain,

Next, we perform the following row operations using row 3 as our pivot row to get,

The matrix is now in the reduced row echelon form,

Therefore the solution is,

the answer is 489

step-by-step explanation:

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4