The coffee beans from 14 trees are required to produce 7.7 kg of coffee. this is the
average amount that each person in the united states drinks per year. how many trees
are required to produce 320 kg of coffee?

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.