Answer:
1. 2c+9=m
Step-by-step explanation:
2,4 -1,2 2,1
MT congruent to CA
tell us y first tho.
20 miles
d miles × (1 h)/(10 miles) = d/10 hours
d miles × (1 h)/(40 miles) = d/40 hours
d/40 = d/10 - 3/2
d = 4d - 60
d = 20 miles