Ask questions and get helpful answers.
Ask a New Question
  1. Questions
  2. math

A river flows at the rate of 2 mph. If a motorboat can travel 12 miles upstream and return in a total of 2.5 hours, what is the speed of the motorboat in still water?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
Cadie
1 answer

  1. d / r = t

    [12 / (m - 2)] + [12 / (m + 2)] = 2.5

    12(m + 2) + 12(m - 2) = 2.5(m^2 - 4)

    0 = 2.5 m^2 - 24 m - 10

    use quadratic formula to find m

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
    scott

Answer this Question

Related Questions

  1. math

    at the rate of 50 mph a car can travel 14.6 miles for each gallon of gas used. On a trip Mr. Hanson used 12.5 gallons of gas traveling at a speed of 50 mph. the number of miles covered during the trip was:

  2. Algebra

    A group of campers and one group leader left a campsite in a canoe. They traveled at an average rate of10km/h. Two hours later, the other group leader left the campsite ina motorboat. He traveled at an average rate of 22km/h. a. How long after the canoe

  3. Math

    Using the formula r = d/t, where d is the distance in miles, r is the rate, and t is the time in hours, at which rate must you travel to cover 212.5 miles in 2.5 hours? a- 71 mph b- 106 mph c- 150 mph d- 85 mph ? What is the simplified form of the

  4. Physics

    A boat heads directly across a river with a velocity of 12 m/s. If the river flows at 6.0 m/s find the magnitude and direction (with respect to the shore) of the boat's resultant velocity.

  5. MATH HELP! CHECK MY ANSWER ASAP!

    1. The formula V = lwh is used to calculate the volume of a rectangular prism. What is the equation solved for h? (1 point) a. Vlw = h b. Iw/V = h c. V/Iw - h** d.Vh = lw 2. What is the equation x = y + z solved for z? (1 point) a. x + y = z b. x/y = z c.

  6. Distance Problems

    A bus and a car leave the same place and travel in opposite directions. If the bus is traveling at 50 mph and the car is traveling at 55 mph, in how many hpurs will they be 210 miles apart. Again please help me with the boxes, Im in advanced math and I'm

  7. calculus

    You are standing at the edge of a slow moving river which is one mile wide and wish to return to your campground on the opposite side of the river. You can swim at 2 mph and walk 3 mph. You must first swim across the river to any point on the opposite

  8. math

    A boy travels on his bicycle at the rate of 6 miles per hour and his sister on hers at the rate of 5 miles per hour. They start at the same time and place and travel over the same road in the same direction. After traveling for 3 hours, the boy turns back.

  9. math

    it takes 6 hours to travel 372 miles.How long will it take to travel 279 miles

  10. Math

    Please help me.... Two cars are starting from positions that are 20 miles apart. They are both headed for the same intersection, as depicted in the diagram below. Car A is traveling at 30 mph, and Car B is traveling at 45 mph. Which car will reach the

Still need help?

You can ask a new question or browse existing questions.