Melody

(Note that P=2,2; Q=6,4; R=6,8; S=2,8)

Hi Rom,

The wording of this question is not familiar to me, nor do i understand your answer, but, if a shape is being shrunk  by 50% about (0,0) isn't it just a matter of halving all the x values and halving all the y values hence getting

P'(1,1),  Q'(3,2)  R'(3,4)  S'(1,4)  ?

$$2(k^2+3k+53)$$

What do you want me to do with it?

@@ End of Day Wrap - Wednesday 30/4/14   Sydney, Australia Time 20:15

Hi everyone,

Questions were once again in abundance. Great answers were given by Alan, Professor, CPhill, Creeperface, Bertie, BluePhoenix912, Anonymous4338, and Rom. Thank you all.

Some nice recognition was also offered from BluePhoenix912, Bioschip and an anonymous person.  Thank you we all appreciate it.

I used Kitty<3's 'fraction on the calculator' post 3 times this morning.  It made answering so much easier.  I usually have more than one forum page open at any one time so that I can post in one and refer to or copy from the others.  I just copied the whole page - not just the address.  It worked a treat.  If anyone wants to use it is located in the sticky thread "Information pages worth keeping or developing."

Gib thinks all children should own a walrus.  And s/he worked out how to insert a picture before Chris or I did.  This is the post. I think Gib's walrus was the ugliest one in the pet shop!

http://web2.0calc.com/questions/what-is-0-3-like-a-ffraction  

We also have an anonymous comedian, s/he has visited before I hope s/he visits often.  The comedian's post along with Chris's interaction was very entertaining!  I thought it was great!! Although it would have been even better without the profanity. Thanks to both of you.

Alan gave me a much needed lesson on using the Tiny Pic upload feature.  I made my first upload on the new system.  I also added the address to the sticky thread "Information pages worth keeping or developing.  Here is a direct link for anyone in need.

That's it for this evening.  Enjoy the rest of your Tuesday/Wednesday. 

Melody

melodymathforum@gmail.com

Thank you Alan.

This is a right angled triangle.

so there is a 90 degree angle and you have to use trigonometry to find one of the others.

The third one can be found with trig or by using the angle sum of a triangle.

LCM means Lowest Common Multiple

and yes the lowest common multiple of 6 and 15 is 30

I'm not so sure that he could resmoke the butts forever but it is good lateral thinking.  

$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}^{\!\!\mathtt{-1}}{\left({\mathtt{0.5}}\right)} = {\mathtt{26.565\: \!051\: \!177\: \!078^{\circ}}}$$

Same as with any calc - it might help if you know;

inverse tan = arc tan

$$tan^{-1}\ x= atanx$$

If the 2 x vaues are the same as with your points then the line will be vertical and the gradient will be infinite.

Maybe someone else can comment here - is it infinite or undefined - I'm going for infinite.