Respuesta :
you want to subtract the amount he already has ridden (145) by that he has to to total (310) to get how many he has left (165).
310-145=165
he should ride about 41.25 miles a day
310-145=165
he should ride about 41.25 miles a day
about 41.25 miles each day if you take 310 miles and subtract it by 145 miles and get 165 then you divide by 4 days you get 41.25 miles