Find the sum between; -2x + 7 and -6x + 4

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.