tyler5281 tyler5281
  • 02-04-2018
  • Mathematics
contestada

The speed of a stream is 2 mph. A boat travels 7 miles upstream in the same time it takes to travel 11 miles downstream. What is the speed of the boat in still​ water?

Respuesta :

Smiley105 Smiley105
  • 02-04-2018
4 = (r-2) t

8 = (r+2) t

4 = (r-2) * [8/(r+2)]

4 = (8r-16)/ (r+2)  . . .multiply by 2


4r + 8 = 8r - 16

4r = 24

r = 6
Answer Link

Otras preguntas

There is a turtle race. The race will last 2 minutes. I have to find the distance from the start each turtle will be at the end of the race. Speed (in inches pe
what type of rock can form a metamorphic rock
Write an equation for a non-vertical line that contains the point ( 2,-4 )
How did New England's physical geography help the growth of industries?
What is 38/50 as a decimal... and what is 28/50 as a decimal? PLEASE HELP ME !!!! i hate struggling with homework!
Predict what happens when zinc is added to water
What is 60 divided by 100 and why? ( I got 0.6 but I'm not sure ) plz hurry
There is a turtle race. The race will last 2 minutes. I have to find the distance from the start each turtle will be at the end of the race. Speed (in inches pe
What is the meaning of Pangaea
Use the order of operations and the digits 2,4,6 and 8 to create an expression with a value of 2