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paulb203's latest activity
paulb203
posted the thread
Is this a simultaneous equation question?
in
Precalculus Mathematics Homework Help
.
hb=54 2h+2b=33 h=54/b therefore, 2(54/b)+b=33 108/b + b = 33 I’ve got a feeling I’ve gone down a blind alley here. Any hints?
May 5, 2024
paulb203
replied to the thread
Why Doesn't LaTeX Render in Preview Mode as It Does After Posting?
.
Thanks, berkeman. Does 'in-line' mean as part of a sentence, i.e, with words and the equation? And what's the difference between the two...
Mar 4, 2024
paulb203
reacted to
berkeman's post
in the thread
Why Doesn't LaTeX Render in Preview Mode as It Does After Posting?
with
Like
.
Note that you put double-$ delimiters at the start and end of each stand-alone line of LaTeX, and double-# delimiters at the start and...
Mar 4, 2024
paulb203
posted the thread
Why Doesn't LaTeX Render in Preview Mode as It Does After Posting?
in
Feedback and Announcements
.
I've been checking out the guide, and practicing but I have a question before I actually post a thread using it. I did go to the LaTeX...
Mar 1, 2024
paulb203
replied to the thread
Solve using complete the square vs. quadratic formula
.
Thanks, guys.
Mar 1, 2024
paulb203
reacted to
Mark44's post
in the thread
B
Inverse Functions: Why rewrite as y=f(x) ?
with
Like
.
I agree in principle with both of the above, but in many cases that involve formulas that relate two physical quantities, it doesn't...
Mar 1, 2024
paulb203
reacted to
PeroK's post
in the thread
B
Inverse Functions: Why rewrite as y=f(x) ?
with
Like
.
A function is a function. Mathematically at least.
Mar 1, 2024
paulb203
reacted to
FactChecker's post
in the thread
B
Inverse Functions: Why rewrite as y=f(x) ?
with
Like
.
If the variables have a defined meaning, then the variables CAN NOT be switched. The inverse of ##F=mA## is ##A=F/m##. The ##F## and...
Mar 1, 2024
paulb203
reacted to
PeroK's post
in the thread
B
Inverse Functions: Why rewrite as y=f(x) ?
with
Like
.
It's clear that if ##y = 2x +3##, then ##x = (y-3)/2##. We can then identify these as inverse functions: $$y = f(x), \ x =...
Mar 1, 2024
paulb203
reacted to
FactChecker's post
in the thread
B
Inverse Functions: Why rewrite as y=f(x) ?
with
Like
.
##f^{-1}(x)## does NOT equal ##x-3/(2)##. When you divide the entire side of an equality by 2, consider enclosing the entire side with...
Mar 1, 2024
paulb203
reacted to
FactChecker's post
in the thread
Solve using complete the square vs. quadratic formula
with
Like
.
@paulb203, I hope that you realize that the quadratic formula is easily derived by completing the square. So the two are actually...
Mar 1, 2024
paulb203
reacted to
Mark44's post
in the thread
Solve using complete the square vs. quadratic formula
with
Like
.
Here's how it goes with completing the square: ##x^2 + 6x = 0## ##\Rightarrow x^2 + 6x + 9 = 9## ##\Rightarrow (x + 3)^2 = 9##...
Mar 1, 2024
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