Which number completes the square? x^2-4x?

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

Aflower has 26 chromosomes. to create a new flower, how many would a sperm cell have what is called?

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.