The product of twice a number and 7

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

Which table shows a proportional relationship between miles traveled and gas used?

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.