Derrick piggy bank currently has 20 quarters, 15 dimes and 45 nickels. What is the ratio of quarters to total coins?

What is the factored form of the following expressions? d^2 – 13d + 36

Can someone me out here number 4 plz

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?