CPhill

I have a whole supply of them......see???

"Fossils" are always prepared.......!!!!!

I should add that Euclid shows us how to bisect an angle.....it's a fairly simple process described here:

Just divide the measure of the original angle by two. That will give you the measure of the bisecting angle.

I gave you "points" anyway....just a slight mistake....I make 'em all the time!!!  Your approach was correct and that's sometimes more important than just getting the  "right" answer.....

I think you have the right idea, ND....let's look at the factoring once more...

2x^2 - 5x - 7 = (2x -7) (x + 1)

So the roots are 7/2 and -1

So

(7/2)/(-1) + (-1)/(7/2) =

-7/2 - 2/7   =  -(7/2 + 2/7) = - (49 + 4)/14  = -53/14

I think that might be it ......

Have good weekend, rosala......and if you have trouble with studying for your maths test, you have a lot of people on the forum who will help you!!!

x^2/16 - y^2/25  = 1

Or, are we sure it's not

4 - 3 + 6 + 2 = 9   and

4 + 3 + 6  + 2  = 15    ????

I love these number games............LOL!!!

I assume that this is either: 

(2-4)/(x-3)   =   -2/(x-3)  = 2/(3-x)        OR

2 - 4/x - 3      which we can rewrite as

2 - 3 - 4/x      =    -1 - 4x

This illustrates the importance of parenthesis and/or brackets.......!!!

If something is reduced by 10%, then it must be worth only 90% of its original price.

So....

.90 * $27.84  ≈  $25.06