the quadratic function f has a vertex at 3,4 and opens upward. the quadratic function g is shown below. g(x)=2(x-4)^2+3. which statement is true

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.