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Pure Mathematics
 Online Tutoring : Forum : Homework Help - Mathematics : Pure Mathematics
Topic Topic: Algebra (Proportion, speed, and factors) Post ReplyNew Question
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Online_tutoring
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Posted: 22 September 2007 at 12:59am | IP Logged Quote Online_tutoring

Problem A.

 

Juan and Anita are standing together in the schoolyard. Juan, who is 6 feet 2 inches tall, casts a shadow that is 54 inches long. At the same time, Anita casts a shadow that is 46 inches long. How tall is Anita?

 

Problem B

 

A boat cruises downstream for 2 hours before heading back. It takes 3.5 hours going upstream to get back. If the speed of the stream is 8 mph, what is the speed of the boat in still water?: *

Problem C

 

If (x+4) is a factor of -x2 -11x - w = 0, then the value of w is: *

a.-60

 b. -28

 c. 28 or

d.60


Please respond to the questions (a, b, and c) above.



Edited by Online_tutoring on 22 September 2007 at 1:05am
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Amitjha
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Posted: 25 September 2007 at 1:13am | IP Logged Quote Amitjha

height of anita=x

then x=74x46/54.........6'2''=74 "

         = 5.25'=5'3" answer problem   A

problem c

put x=-4 in the above equation, we get w=60 answer



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Amitjha
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Posted: 25 September 2007 at 1:41am | IP Logged Quote Amitjha

i have solved problem B also. do u need it then email me or pm me.

thx



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