a.h + 3.5 = 18
b.h + 7 = 18
c.h + (h – 3.5) = 18
d.h + (h + 3.5) = 18
Agora cyber charter school
1.Before lunch, the family traveled at a speed of 45 mph.
2.The family drove 45 miles after they stopped for lunch.
3.The family drove 45 miles before they stopped for lunch.
4.After lunch, the family traveled at a speed of 45 mph.
After lunch, the family traveled at a speed of 45 mph.
Answer:
32.5 miles
Step-by-step explanation:
Given that:
Eastbound bus :
0.8 miles every 45 seconds
Speed per second :
0.8 / 45 = 0.0177777 miles per second
Distance after 15 minutes
(15 * 60) * 0.0177777 = 16 miles
Westbound bus:
0.55 miles every 30 seconds
Speed per second :
0.55 / 30 = 0.0183333 miles per second
Distance after 15 minutes :
(15 * 60) * 0.0183333 = 16.5 miles
Distance apart :
16 miles + 16.5 miles = 32.5 miles
METHOD 2:
Distance covered after 15 minutes :
15 minutes = 15 * 60 = 900 seconds
Distance apart after 900 seconds :
[0.8 * (900/45)] + [0.55 * (900/30)]
16 + 16.5
= 32.5 miles