If a + b = 0, then (1 + x^a)^-1 + (1 + x^b)^-1 - x^a+b =

When x⁵– 5x⁴+ 9x³– 6x²– 16x + 13 is divided by x² – 3x + a, the quotient and the remainder are x³ 2x²+ x + 1 and  – 15x + 11, respectively. The value of a is equal to

The system of equations x + 2y = 3 and 2x + 4y = 3, has

If 8e + 2p = 12 and y – 3p = 4, then what is the value of y?

If 4x + 5y = 83 and 3x/2y = 21/22, then y-x = ?

If y(u) = 2u² + 2 then what is the value of y, if u = 3?

If u(m) =3m²+ 2 then what is the value of u(m + 4)?

If  a * b – 2a – 3b + ab, then 3 * 5 + 5 * 3 is equal to:

s varies directly as the square of p. When s = 3.5, p = 0.5 If s = 90, then c would be equal to

Find tan 9 − tan 27 − tan 63 + tan 81 ( all angles in degrees)