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rational equations ( i need help )  TOPIC_SOLVED

5. the water current is 3mph. going upstream for 36 miles against the current takes one hour longer than going the same distance downstream with the current. find the speed of the boat in still water. thanks? 7. together bart and lisa require 3 hours and 36 mins to clean the house. Alone, bart would...
by vcanezal
on Thu Apr 04, 2013 11:30 pm
 
Forum: Intermediate Algebra
Topic: rational equations ( i need help )
Replies: 3
Views: 2084

Re: rational equations ( i need help )  TOPIC_SOLVED

5. i got 15 in still water by this equation.[36/x-3 minus 36/x+3 = 1] LCD=(x-3)(x+) 36x+108-36x+108=x^2-9 216=x^2-9 216+9=x^2 square root of 225 +or- =square root of x^2 15=x since its still water. idk if i did it right tho 7. idk. got stuck with the decimals. [(1/x+3)(3.36) + (1/x)(3.36)= 1] xLCD( ...
by vcanezal
on Fri Apr 05, 2013 2:01 am
 
Forum: Intermediate Algebra
Topic: rational equations ( i need help )
Replies: 3
Views: 2084

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