Could be used to model: A store is having a sale on car stereos. First a certain percentage is taken off the price, and then the price reduced by a fixed number of dollars, representing the purchase price.
A) 12x - 300 = 800 B) 1500 -120x = 660 C) 14x + 3x + 150 = 1102 D) 0.9x - 10 = 116

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

When you answer this can you explain

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?