What number has the same value as12 tens

What is the vertex form of f(x) = x2 + 6x + 3

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?

Which choice has the correct steps in graphing the solution set to the following inequality? -45_> 20x-5y