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related to: boats 2c+boats river

1. ### HELP WITH THIS WORD PROBLEM?!?

12/(v-c) = 2 12/(v+c) = 1 12 = 2v- 2c 6 = v-c 12 = v+c 18 = 2v v = 9 c = 3 Boat = 9 mph Current = 3 mph

2 Answers · Science & Mathematics · 05/09/2012

..., then sin # + cos # = -- b / a and sin # cos # = c /a giving (--b/a)^2 -- 2c /a = 1 OR b^2 = a^2 + 2ac ANSWER (A) Que-2) A boat sails down the river for 10 kmand then up the river for 6 km. The speed of the river flowis...

1 Answers · Science & Mathematics · 09/02/2012

3. ### Help with relative velocity?

...c+2) - c = 5 3 + 6/c + 3 - c - 2 - c - 5 = 0 6/c = 0 - 2c -1 + 6/c = 0 ← multiply by -c 2c² +c - 6 = 0 quadratic...so the current speed is 1.5 km/h ← a) b) then the boat 's speed v = 2 + c = 3.5 km/h Bonus: then the...

1 Answers · Science & Mathematics · 05/02/2012

4. ### Any math smarties want to crack a word problem?

...since we don't like big number 2(8 - c) = 8 + c Distribute 16 - 2c = 8 + c Solve for c c = 8/3 So the speed of the river is 8/3 km/h

1 Answers · Science & Mathematics · 15/12/2010

5. ### A FUN PUZZLE TO SOLVE: There are 3 Cannibals and 3 humans on one side of the river and the 3 humans need to?

[Best Answer] 2C cross, 1 remains, one returns 1:1 cross, 1H remains, 1C returns 2H cross, 1C returns with the boat to the first shore

4 Answers · Science & Mathematics · 04/09/2006

6. ### Math 990, variable elimination; Need help with story problem!?

Let AB is the distance of the river that the crew travelled. case1: boat travelling with the current: S = (u+x)t => 12 = (u+x)2...eq1 case2...

2 Answers · Science & Mathematics · 23/10/2014

7. ### Help with this math problem?

...28 + c = b 34 = 28 + c + c 34 = 28 + 2c 34 - 28 = 28 -28 + 2c 6 = 2c 6/2 = 2c /2 3 = c 34 = b + c 34 = b + 3 34 - 3 = b + 3 - 3 31= b 28 = b - c 28 = b - 3 28 + 3 = b - 3 + 3 31 = b boat speed is 31 and cureent is 3 mph

1 Answers · Education & Reference · 01/03/2011

8. ### Word problem!!!!!!!!!!!!!!!!!?

b = speed of boat in still water c = speed of current (distance) = (rate)(time) 30 mi. = (b - c)(2.5 hr.) 12 mph = b - c [1] 30 mi. = (b + c)(2 hr.) 15 mph = b + c [2] [2] - [1]: 3 mph = 2c c = 1.5 mph [1] + [2]: 27 mph = 2b b = 13.5 mph

1 Answers · Science & Mathematics · 06/03/2010

9. ### Grade 10 math help... Motion problems solve using Elimination?

...=10; and plugging back in, get C=2 [ you could also subtract and get 2C =4, which is just arithmetic, not proof ] if you set (SW+C)*2=24...

2 Answers · Education & Reference · 20/08/2013

10. ### Math help for exam please?

...in one of the equations with 10 and simplify: 2(10+ c) = 24 20 + 2c = 24 2c = 4 c = 2 speed of the boat = 10 current = 2

2 Answers · Education & Reference · 22/03/2010