Simplify these 12 radicals: 1) √80 2) √64 3) √45 4) √54 5) √32 6) √36 7) √150 8) √20 9) √180 10) √72 11) √8 12) √50

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

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me