
Answer:
see below
Step-by-step explanation:
4x - 2y = 12  ⇒  2y = 4x - 12  ⇒  y = 2x - 6
2x + y = 13  ⇒  2x + 4 = 13  ⇒ 2x = 9  ⇒ x = 9/2
y = 4x - 1  ⇒  y = 4(-1) - 1 = -5  ⇒  true
x + y = 8  ⇒  -2 + y = 8  ⇒  y = 10
3x - 4y = 5  ⇒  3x - 4y - 5 = 0  ⇒  a = 3  b = -4  c = -5
3y = -4 - 5x  ⇒  5x + 3y = -4
True
3x + 4y = 5
y = 4x - 7
2x + y = 10  ⇒  2(0) + 3 = 5 ≠10  ⇒  False
(1, 8)  ⇒  4(1) + 8 = 12
x + 2y = 14
No,  y= x² + 2 is a quadratic equation