algebra

rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 hours. The speed of the river is 5km/h.Find Abby's speed in still water.

  1. 👍 0
  2. 👎 0
  3. 👁 227
asked by sheba
  1. 10/(v-5)+10/(v+5)=3
    10(v+5)+10(v-5)=3(v+5)(v-5)
    20v=3v^2-75
    3v^2-20v-75=0

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    Rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 hr. The speed of the river is 5km/h. Find Abby’s speed in still water.use five-step problem solving process

    asked by Taina on June 24, 2011
  2. intermediate algebra

    Rowing. Abby rows 10km. upstream and 10km. back in a total time of three hours. The speed of the river is 5km./h. Find Abby's speed in still water.

    asked by ROCKY on August 2, 2011
  3. Math

    Toni rows a boat 4.5 km/h upstream and then turns around and rows 5.5 km/h back downstream to her starting point. If her total rowing time is 48 min, for how long does she row upstream? you can express your answer to the nearest

    asked by Angie on January 17, 2009
  4. 7th Grade Math

    Toni rows a boat 4.5km/h upstream and then turns around and rows 5.5km/h back to her starting point. If her total rowing time is 48 min , for how long does she row upstream?

    asked by Rebecca on January 4, 2012
  5. applications involving quadratic

    Abby rows 10 km upstream and 10 km back in a total time of 3 hr. The speed of the river is 5km/h. Find Abby’s speed in still water.

    asked by Elisa on June 19, 2011
  6. algebra

    could you please show me how to do this problem? Bob rows 6 miles downstream in 1 hr, joe rows 6 miles upstream in 2 hr. joe rows 1 mile per hour faster. a. what is each of their speed, bob 6/1=6mph joe 6 + 1 = 7mph is this

    asked by ann on April 15, 2012
  7. math

    a man rows downstream for one hour and 40 minutes on a river flowing at 2 miles per hour. on his returned trip he rows upstream for 5hours. find the distance that he traveled downstream and his speed of rowing in still water.

    asked by yanyan on September 6, 2012
  8. algebra

    Abby Tanenbaum paddled her canoe 10 miles upstream, and then paddled back to her starting point. If the rate of the current was 3 mph,and the entire trip took 3.5 hours, what was Abby's rate (in still water)?

    asked by Jennifer on April 23, 2013
  9. MATH

    Abby, Betty, Cassie, and Dale need to cross the river on a boat. The boat only fits at most two people. If two people go over one must bring it back for the others. Abby takes 1 min., Betty 2 min., Cassie takes 5 min., and Dale

    asked by Chris on April 27, 2015
  10. Math

    Lisa rowed her boat for two miles downstream. The trip took her 20 minutes. She then turned around and rowed back the two miles. It took her one hour to row back upstream. a. At what rate of speed did Lisa row downstream? b. At

    asked by Wendy on December 1, 2015

More Similar Questions