Answer:
A
Explanation:
let m represent the morning route and a the afternoon route , then create 2 simultaneous equations and solve for m.
16m + 12a = 141 → (1)
10m + 15a = 123.75 → (2)
multiplying (1) by 15 and (2) by - 12 and adding will eliminate a
240m + 180a = 2115 → (3)
- 120m - 180a = - 1485 → (4)
add (3) and (4) term by term to eliminate a
120m + 0 = 630
120m = 630 ( divide both sides by 120 )
m = 5.25
the distance of the morning route is 5.25 miles