The translation (x, y)(x  + 3,  y  – 7) maps  tuvw  onto  t'u'v'w'. what translation maps  t'u'v'w'onto  tuvw?

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.