P varies directly with W. W is 40 when P is -100. Find W when P is 42.

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?

If a is a nonzero real number then the reciprocal of a is

Based on the diagrams, what is the value of x?