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[quote][i]Originally posted by skeeter[/i] [br][sqrt](x[squared]t[squared]) = 2tx square both sides ... x[squared]t[squared] = 4t[squared]4tx+x[squared] 0 = 5t[squared]4tx 0 = t(5t4x) since t>0, 5t = 4x ... 5/4 = x/t [/quote]
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T O P I C R E V I E W
Haven
Posted  09/25/2008 : 08:46:19
The information given is:
x
 t
equals 2t  x
If x and t are positive numbers that satisfy the equation above, what is the value of x divided by t?
The answer given was 5/4
How was this answer obtained. An explanation would be greatly appreciated.
2 L A T E S T R E P L I E S (Newest First)
Haven
Posted  09/25/2008 : 14:29:45
Thanks Again Skeeter.
skeeter
Posted  09/25/2008 : 11:12:05
(x
t
) = 2tx
square both sides ...
x
t
= 4t
4tx+x
0 = 5t
4tx
0 = t(5t4x)
since t>0, 5t = 4x ... 5/4 = x/t
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