Melody

this year, beavis is 4 times as old as Mavis, while in 5 years time, he will be 3 times as old as mavis. what are the current ages of beavis and mavis.

p.s. i already found the answer (beavis is 40, and Mavis is 10), but i am not really sure how to work it out and what steps to take. could you please write a solution for me.

B=4M                          (1)

B+5=3(M+5)               (2)

Sub (1) into (2)

4M+5=3(M+5)

4M+5=3M+15

M=10                        Marvis is 10

B=4*10=40                Beavis is 40

If you don't understand make sure you ask for more explaniation.

NEXT time is it better to put your new question up in a new post    

Thanks Chris :)

$$\\4^{3/2}*16^{-3/4}\\\\
=(4^{1/2})^3*(16^{1/4})^{-3}\\\\
=(2)^3*(2)^{-3}\\\\
=2^{3-3}\\\\
=2^0\\\\
=1$$

It is 408.41 unit^2    Correct to 2 decimal place

Your teacher probably rounded pi off more than you did and that is why her/his answer is a little less acurate :)

Thanks Alan, that is really neat.     

I have been thinking about that problems since it was first posted. 

That makes good sense, Thanks Bertie  

@@ End of Day Wrap  Mon 15/6/15   Sydney, Australia Time   7:05am   ♪ ♫

Hello everyone,

It has been a very quiet two days.  I am told that is because the U.S students are mostly on a long summer break. 

Anyway, there have still been lots of questions and our wondeful answerers were: CPhill, Civonamzuk, Alan Radix, Pyramid, Fiora, MathsGod1 and BrittanyJ.  Thank you all  

Maybe from this you can work it out yourself :/

The circumference of the circle is the length of the rectangle.

Tues 16/6/15

If you would like to comment on other site issues please do so on the Lantern Thread.  Thank you.    

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FTJ means 'For the juniors'