Supposed two angles are supplementary and one of them measures 31 degree what is the measure of the other angle

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?

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?