Solve the multi-step equation by combining like terms and using inverse operations and the properties of equality. Equation: –4x – 5 + 2x = –11

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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?