Wich structure ate found in plant cells but not in animal cells multiple choice

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

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?

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?