ryan has n nickels and d dimes. He has at most 15 coins altogether. Write this equation as in inequality

Find the given elements if matrix d:

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

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?