Flying with the wind, a small plane flew 240 mi in 2 h. against the wind, the plane could fly only 210 mi in the same amount of time. find the rate of the plane in calm air and the rate of the wind.

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

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

Factor the polynomial. b^2 + 4b + 4