Answer:
6 mph
Step-by-step explanation:
Difference in distance
= 15 - 12
= 3 mi
time taken
= 30 mins
= 1/2 hour
Speed
= 3 ÷ 1/2
= 6 mph
Its B
Answer: view picture
40
P(42) = (6/7)(42) + 4 = 36 + 4 = 40