Posted by ladybug on Thursday, October 25, 2012 at 10:27pm.
y=3x/x^2 + 81
for the given equation, list the intercepts and test for symmetry.

college algebra  Reiny, Thursday, October 25, 2012 at 10:46pm
You have posted many times, and by now you should know that you will NEED brackets for equations like this to establish the proper order of operation.
I am sure you meant to type:
y = 3x/(x^2 + 81)
when x = 0, y = 0/81 = 0, so the origin is both a y and x intercept
subbing in a positive x will yield a positive y
subbing in a negative x will yield a negative y
but the absolute value will be the same
also , notice that f(x) = f(x)
e.g. x = 1, then y = 3/82
if x = 1 , y = 3/81
so there is a reflection in the origin.

college algebra  ABN Tee, Sunday, October 28, 2012 at 11:02am
The height h(t), in feet, of an airborne tee shirt t seconds after being launched can be approximated by h(t) =  15t^2+10, 0<t<. Find the times when the tee shirt will reach a fan 190 feet above ground level. The tee shirt will reach the fan at how many seconds?
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