# Quadratic Equations and Simultaneous Equations MCQs - Math Test 8

MCQ. Solve equations: x + 2y = 13, x + y + z = 12, 2y + z = 11

- x = 3, y = 4, z = 5.
- x = 5, y = 4, z = 3.
- x = 4, y = 5, z = 3.
- x = 3, y = 5, z = 4.

B

MCQ. Solve equations: x + 2y = 23, x + y + z = 33, x + 2z = 43

- x = 1, y = 21, z = 11.
- x = 11, y = 1, z = 21.
- x = 1, y = 11, z = 21.
- x = 21, y = 11, z = 1.

C

MCQ. Solve equations: 2x^{2} + y^{2} = 600, 3xy = 600

- x = 10, y = 20.
- x = 20, y = 10.
- x = -10, y = -20.
- x = -20, y = -10.

A

MCQ. Value of b^{2} - 4ac determines nature of roots, for real and different roots, b^{2} - 4ac is:

- lesser than 0.
- equal to 0.
- greater than 0.
- None of above.

C

MCQ. Value of b^{2} - 4ac determines nature of roots, for real and equal roots, b^{2} - 4ac is:

- lesser than 0.
- equal to 0.
- greater than 0.
- None of above.

B