What is the value of the expression 4x+y/2y−x when x = 2 and y = 4? a.2 b. 3 c. 4 d. 6

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?