What is 2 times y in an algebraic expression i need

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?