Which of these output devices are used for the

If -5 ≤ x ≤ 3 and -1 ≤ y ≤ 0, then the minimum value of 2y – 3x is:

Quantity I – In how many ways letters of MOBILE can be arranged when vowels are always together.

If (a + b)/c = 6/5 and (b + c)/a = 9/2, then what is the value of (a + c)/b?

There are 6 blue pens, 5 black pens and 4 green pens in a bag. Three pens are chosen randomly.

If 3x + 5y + 7z = 49 and 9x + 8y + 21z = 126, then what is the value of y?

If a + b² + c² = 16, x² + y² + z² = 25 and ax + by + cz = 20, then the value of (a+b+c)/(x+y+z)

If x1x2x3 = 4(4 + x1 + x2 + x3), then what is the value of [1/(2 + x1)] + [1/(2 + x2)] + [1/(2 + x3)]?

If a + 1/a = -2 then the value of a¹⁰⁰⁰ + a^{- 1000} is

 is equal to: