Annoying Solvers

[101dalmatians]

There are a few solvers that are like really annoying...
My 89 is SUPPOSED to be good at this stuff. Yet, I just couldn't do this question...

For example, what is the solution to:

[unparseable or potentially dangerous latex formula]

[darksaber21]

My TI-89 gave me 2.50 as my answer. But you can do it by hand if you so choose:


Since [unparseable or potentially dangerous latex formula] is the same as [unparseable or potentially dangerous latex formula], then that would mean that the exponents and bases are all exactly the same. So, we can assume the following:

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]


Plugging into the original equation does indeed prove that the answer is 2.50

[101dalmatians]

Mine gives me "Domain Error"...
But I get ur hand solving method...

[101dalmatians]

I know the trick but I am like so annoyed when every single time, I get it WRONG!!!!!!!!

The question that says,"It is now 3:30. In how many minutes will the hour and minute hand line up to 50 degrees?"

I know the formula: [unparseable or potentially dangerous latex formula]

However, whenever I apply it, I make a mistake.
Can anyone tell me how i should apply this formula?

[darksaber21]

First to see if the minute hand and hour hand makes a 50 degree angle between 3:30 and 4:00 (which I know doesn't happen, but I'll show you anyway)

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]


Obviously, this is behind 3:30 (around 3:07), so we now check between 4:00 and 5:00:

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]


Since the first time after 3:30 the two hands make a 50 degree angle at around 4:13, the answer would be 42.7 minutes.

[101dalmatians]

oh... so when you find an answer for the no. of minutes, you calculate the minutes from the beginning of the hour - like 3 instead of 3:30? that's the mistake I always did! Thanks...