(12x + y + z = 26
x-11y = 17
1 x - y + 4z =23

4x +y +z =23
x-11y = 17
x - y +12z- 26

x+y +Z=4
x - y = 11
x - y +z=12

x+y+z = 12
x - y = 11
x-y+Z=4

Which linear system has this matrix of constants? [[12][11][4]

Option D. D has the matrix of constants [[12], [11], [4]].

Step-by-step explanation:

Step 1:

With the given equations, we can form matrices to represent them.

The coefficients of x, y, and z form a matrix of order 3 ×3, the variables x, y, and z form a matrix of order 1 ×3 and the constants form a matrix of order 1 ×3.

Step 2:

The linear system A is represented as

.

Step 3:

The linear system B is represented as

.

Step 4:

The linear system C is represented as

.

Step 5:

The linear system D is represented as

.

Step 6:

Of the four options, the linear system D has the matrix of constants [[12], [11], [4]]. So the answer is option D. D.

step-by-step explanation:

1

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24