Answer:
- no
- yes
Explanation:
You want to know if the given point is the solution to the given system of equations.
The answer can be found by substituting the point values into the equations. If both are satisfied, the offered solution is correct.
1.
Try (x, y) = (-1, 1) in 3x -y = 4:
3(-1) -(1) = -4 ≠ 4 . . . . . . not the solution
2.
Try (x, y) = (9, 15) in 6x -2y = 24:
6(9) -2(15) = 54 -30 = 24 . . . . . . possibly the solution
Try (x, y) = (9, 15 in -3x +3y = 18:
-3(9) +3(15) = -27 +45 = 18 . . . . . is the solution to the system
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Additional comment
A graphing calculator can quickly tell you the solution to the system of equations.