Which angles are corresponding angles

Which expression shows the sum of the polynomials with like terms grouped together

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

Use the given information to determine the exact trigonometric value.