Abag contains 60 marbles, some blue and some green. the ratio of blue marbles to green ones is 1 : 5. how many blue marbles are there?

Solve 2x+y=3 x+y=5 in substitution method

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

Solve -.016x= -16. need solving this