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A can do a piece of work in 12 days, B can do it in 15 days. If they work together, how long will it take to complete the work?

A. 6.67 DAYS
Posted in:  Time & Work -  Aptitude -  Mathematics

If the roots of the quadratic equation ax^2 + bx + c = 0 are real and distinct, which of the following must be true?

A. B^2 - 4AC > 0
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

What is the solution to the system of equations: 2x + 3y = 6 and x - y = 1?

A. (3,0)
Posted in:  Linear Equations -  Algebra -  Mathematics

Which of the following pairs of equations represents parallel lines?

A. 2X + Y = 4 AND 4X + 2Y = 8
Posted in:  Linear Equations -  Algebra -  Mathematics

What is the graphical representation of the equations x + y = 5 and x - y = 1?

A. TWO INTERSECTING LINES
Posted in:  Linear Equations -  Algebra -  Mathematics