An furniture salesperson sells a couch for $1,560. she receives a 2.75% commission on the sale of the couch. how much did she earn on the sale? round your answer to the nearest cent.

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.

Which expression is equal to (f+g)(x)?

Which of the following vectors are orthogonal to (2,1)? check all that apply