If 7 is subtracted from twice a certain number x, the result is at most 5. What is the range of the number?

Simplify (6 - x - x2) ÷ (x2 - 4)

Mohammed is 8 years older than Joy now. In five years’ time he will be twice as old as Joy. How old is Joy now?

The diagonals of a rhombus are 6cm and 8cm. Find the area of the rhombus.

If (x - a) is a factor of bx - ax + x2 - ab, what is the other factor?

In Δ ABC, A = 60°, C = 90° and AC = 12m. Find the Length of the hypotenuse.

Evaluate log 18 + log6 - log16\(^{\frac{1}{2}}\)

Find the absolute mean deviation of the sample 10, 12, 14, 11, 13.

For what value(s) of x is the expression (x2 + 15x + 50) ÷ (x - 5) not defined