Step-by-step explanation:
Let's say b is the rate of the boat in still water, and c is the rate of the current.
Distance = rate × time
Going upstream:
100 = (b − c) (5)
20 = b − c
Going downstream:
100 = (b + c) (2)
50 = b + c
Solve the system of equations using substitution or elimination. Using elimination, add the equations together:
70 = 2b
b = 35
c = 15
The boat's speed is 35 km/h, and the current's speed is 15 km/h.
Answer:
x = 21.013155617496
Step-by-step explanation:
we have a right triangle then ,
Then
Then
x ≈ 21
The answer is the number will have to be less than 11 which means that it is a. 9
sorry if it is incorrect.
Answer:
x=16
Step-by-step explanation:
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Answer:
"How much did Wang Yong pay each month" answer: $170
"How long did it take Wang Yong to pay back his entire debt?" answer: 50 months
