Correct answer only plot the inequality on the number line.

x is  more or equal than -7 but less than or equal than -2.

So, we are going to have interval [-7,-2] , both dots should be filled, because of signs ≤ and ≥.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,