In this expression, Marianne claims that 2x and x are not like terms because x does not have a coefficient. Is she correct? Explain your reasoning.

Which function has the same domain as y=2x

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.

Solve for x where 0 equation: cot^2x+2cotx+1=0