The number of hours required to do a painting job is represented by the function f(x)=2/x, where f(x) gives the number of hours and x is the number of painters doing the job. how much time will {4, 10, 14, 16, 18} workers take to do the job?
{0.2, 0.7, 0.8, 0.9, 1.0}
{0.1, 0.4, 0.6, 0.8, 0.9}
{0.2, 0.59, 0.73, 0.84, 0.9}
{0.11, 0.125, 0.14, 0.2, 0.5}

Find the solution of this system of equation -7x+y=-20 9x-3y=36

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?