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#1 Help Me ! » Help FAST! » 2017-09-03 11:38:29

Lolz
Replies: 5

Let m be a positive integer, and suppose that 9 is its own inverse (mod m), but 3 is not its own inverse (mod m). How many values for m are there?

#2 Re: Help Me ! » help! Geo » 2017-07-31 13:34:54

all I did wuz take 30 seconds to think really hard on it and got it. Answer is 13.

#3 Re: Help Me ! » help! Geo » 2017-07-30 06:42:13

Or we could use something like trig, but we don't have the angles to do it fast. Anyway, the midpoint between the two lines is (4,-3). It would be nice if there was an online calculator... but didn't find one. Is there a formula for this problem?

I was working on this problem mentally and got something...probably wrong.

#4 Help Me ! » help! Geo » 2017-07-30 05:25:37

Lolz
Replies: 8

Plz give hints to the problem. It seems easy but it is not.

The points $A\, (5,-5)$ and $B\, (-1,-1)$ are the endpoints of the hypotenuse of an isosceles right triangle $\triangle ABC$. What is the area of $ABC$?

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