Find the measure of one interior angle of a regular polygon with 6 sides

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 represents the factorization of the trinomial below? x^2+7x-30

How do i i solve this equation? -18 = x/3 + 3