Melody

Hi Funkygal,

Welcome to the forum  

ALWAYS give help in preference to giving answers.  

Answers without explanations are usually worse than useless.

Whereas, explanations without answers are to be encouraged :)

No I do not know.     

The question does not really make sense but

80%=0.80=0.8

and

0.8% =0.8/100 = 0.008

The external angle of a triangle (120) is equal to the sum of the 2 opposite internal angles (58+?)

$$x^2\times x = x\times x\times x = x^3$$

Thanks Alan, that is a really neat feature in Desmos that I have only just started to make proper use of.  

You beat me Alan.  :(

Two answers are always better than one!  :))

I have graphed this in 3 steps to try and show you pictorially how it is done.

Hi Civonamzuk,

What you have done may well be correct but I don't follow your logic.

Could you please add in some more working ?

Hi MathsGod1

Watch and learn :))

What is   $$0.\bar 4 $ as a fraction$$

Let  X=0.444444444

so

10X=4.44444444.....

   X =0.44444444

subtract

10X-X = 4      All the other 4's subtract away

9X=4

X=4/9