Respuesta :
Shane's mother's average speed is 6.7 MPH
10miles/ 90 minutes=1/9
Miles/minute
60 minutes/ hour
1/9 *60
Minutes/ hours= 6 2/3
10miles/ 90 minutes=1/9
Miles/minute
60 minutes/ hour
1/9 *60
Minutes/ hours= 6 2/3