Samantha says (6^4) -3 = 6. is she correct? why or why not?

Which of these tables represents a non-linear function?

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.

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?