Which inequality's graph will have a solid boundary line?

A.
2x + 3y > 7

B.
x + y < 5

C.
3x + 2y < 1

D.
x − y ≤ 5

D

x − y ≤ 5

Step-by-step explanation:

When drawing lines for inequalities in a graph, all lines whose equation have the greater than or less than signs are dotted hence they can't be solid boundary lines. Otherwise, all other equations with equal sign, less than or equal and greater than or equal are represented by a solid boundary line. In this case, the only equation that qualifies for a solid boundary line is x − y ≤ 5 since the other equations have either less than or greater than signs

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,

hope this is what you were asking for!

step-by-step explanation: