In the first quadrant you start at (7,4) and move 4 units left and 3 units up.

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Which graph represents the equation y =4x

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?