Answer:
2000 meters
Step-by-step explanation:
When the motorboat is moving downstream, its speed relative to the ground is 18 km/h, so its speed relative to the raft is 15 km/h.
When the motorboat is moving upstream, its speed relative to the ground is 12 km/h, so its speed relative to the raft is again 15 km/h.
Converted to m/min, the relative speed is:
15 km/h × (1000 m/km) × (1 h / 60 min) = 250 m/min
It takes the motorboat 16 minutes to travel to the front of the raft and back. Since the speed is the same in both directions, the motorboat takes 8 minutes to travel the length of the raft.
So the length of the raft is 250×8 = 2000 meters.
Answer:
TRUE
Step-by-step explanation:
<u>what is a linear equation?</u>
It is said that a linear equation the equation which can be put in a form where there are variables, and there are coefficients, that are mainly and commonly 'actual numbers'
HOPE THIS HELPS!!
Answer:
512 mph
Step-by-step explanation:
The relevant relation is ...
speed = distance/time
speed = 1792 mi/(3.5 h) = 512 mi/h
The plane's average rate of speed should be 512 miles per hour.
Answer:
2 2/7
Step-by-step explanation:
3 3/7 ÷ 3 = 1 1/7, 1 1/7 x 2 = 2 2/7
Answer:
6y - 8xy
Step-by-step explanation:
2y-3xy+4y-5xy
Combine like terms:
(2y+4y) + (-3xy -5xy)
6y - 8xy
