One column of numbers consist of 2842 and 14 when the digits of a number added together the result is 2+8+4+2+ one +4 equals 21 i want to digits of 21 with an added together the result is 2+1 = 3 of the same process as performed on the numbers in a second column what can be

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.