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2315
bio website joetaxpayer.com
location Sudbury, MA
age 52
visits member for 1 year, 10 months
seen 5 hours ago

Father, husband, puppy person, and financial author.

Blogger at the eponymous JoeTaxpayer.com

Blogger at RothMania

Blogger at Stock Options Cafe

Moderator at the usenet group misc.taxes.moderated

Guest author at TurboTax

Guest author at H&R Block

On Twitter at @joetaxpayerblog

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Nov
13
revised System of nonlinear equations that leads to cubic equation
added 2 characters in body
Nov
13
revised Can you make an equilateral triangle from 3identical trapezoids?
edited body
Nov
13
answered System of nonlinear equations that leads to cubic equation
Nov
9
awarded  Custodian
Nov
9
reviewed No Action Needed Set Theory - Subset of set
Oct
20
reviewed No Action Needed What is a cartesian equation for 3 space passing through 3 points?
Oct
18
comment How to calculate to the power of 1/n?
the y^x key is 2nd fcn( on this calculator.
Oct
18
comment Find the equation of the parabola with its vertex on the line $2y-3x=0$?
If the axis of symmetry is parallel to the X axis, we're talking x=y^2, not the usual y=x^2. That's a start.
Oct
3
comment Can someone explain how $\frac{\tan x}{\sec x}=\sin x$?
+1. Elsewhere here, I'd been in a discussion of this type of manipulation. Your method is one I'll add to my bags of tricks.
Sep
24
accepted How to articulate this expression
Sep
24
comment How to articulate this expression
Thanks, John! I'd rather ask here to be sure than to mis-speak to these high schoolers.
Sep
24
asked How to articulate this expression
Sep
18
comment finding solutions by factoring
The graph of this function is a hyperbola. There is no point solution but a graph of points that satisfy the equation .
Sep
12
comment Limit of $\sin(3x)/x$ as $x$ goes to zero
Right, but as I noted in the other answer, this wasn't a given. Although I appreciate this method to get here once the first problem is solved.
Sep
12
comment Limit of $\sin(3x)/x$ as $x$ goes to zero
@bungo - Same issue. I didn't solve that one either.
Sep
12
awarded  Curious
Sep
11
comment Limit of $\sin(3x)/x$ as $x$ goes to zero
@bungo - it was in the same set of problems. I imagine that once this section is behind us, it's considered a given. But not yet.
Sep
11
comment Limit of $\sin(3x)/x$ as $x$ goes to zero
no, that was an earlier question in the same assignment. Not yet a given.
Sep
11
asked Limit of $\sin(3x)/x$ as $x$ goes to zero
Aug
14
comment I am getting a number below zero when caluclating out two standard deviations from the mean. Is this ok?
The 'less than zero' simply means the distribution isn't a perfect bell curve. Just like a live adult can't have negative height or weight, even if the curve shows that some portion should, the homicide rate can't go negative.