SOLUTION: please help me in the following algebra questions and don't use iteration=http://postimage.org/image/ogyxi2k1n/full/

Question 629575: please help me in the following algebra questions and don't use iteration=http://postimage.org/image/ogyxi2k1n/full/
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
46 a)
d = r*t
t = d/r
On the sand, d = 20 - x meters
t = (20-x)/6.4 seconds
------------------
Swimming, meters
seconds
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b)

----------------
c)
Using graphical methods, x =~ 1.7045 meters
That's the value of x for the minimum total time to from A to B with the speeds given.
=============
The exact value of x =
x =~ 1.704437 meters
--------------------------
Elvis has to do some good cornering to detect a difference.
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