...c - 12 b + c = 20 substitute: (c - 12) + c = 20 2c - 12 = 20 2c = 32 c = 32/2 = 16 km/hr using first equation... second equation: 4 + 16 = 20 20 = 20 The boat 's speed is 4km/hr. The current speed ...

1 Answers · Education & Reference · 30/04/2013

...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

... for each direction Against current 60 = (r - c)(2) 60 = 2r - 2c 30 = r - c r - c = 30 <----- With current 60 = (r...the two equations 2r = 90 r = 45 In still water the boat goes 45mph m06242013

2 Answers · Education & Reference · 30/06/2013

... boat will have a speed of v - c against the shore. (The boat 's moving and the current is opposing... must be equal, so 15/2 - c = 7/2 + c 15/2 = 7/2 + 2c 8/2 = 4 = 2c c = 2 km/hr I'll leave...

1 Answers · Education & Reference · 12/07/2009

...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

... you along. If r represents how fast the boat goes in still water and c represents the speed...each other: 3(r-c) = 2(r+c). Distribute: 3r-3c=2r+ 2c . Isolate c: r= 5c. Now substitute this r=5c...

2 Answers · Education & Reference · 15/05/2013

...substitute eq(a) into eq(b): (14 - c) - c = 8 14 - 2c = 8 - 2c = -6 c = -6/-2 = 3mi/hr using eq(a): b = 14 - 3 = 11mi/hr check using eq(b): 11 - 3 = 8 The boat travels 11mi/hr in still water. The current...

2 Answers · Education & Reference · 01/11/2011

...bulky and was best transported on a boat , whereas precious stones were likely to be small...+did+not+have+many+natural+resources% 2c +so+they+were+imported+from+other+places...

1 Answers · Education & Reference · 23/11/2015

... not sure what type you need so here is a current/ boat one A person is kayaking in a river... the difference between the speeds is 2c . Therefore, we can do this: 10-4= 2c 6= 2c 3=c...

1 Answers · Education & Reference · 31/08/2011

...=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