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small calculation that i forgot how to do.. 1Q fractions

Well basically i need to get r2​ on its own, only one problem i forgot how to do that :s-smilie:. Help? Also its a question on comparative pie charts just saying...

(edited 9 years ago)
WIN_20150120_214333.JPG125.7KB
Reply 1
Avatar for moththecat
moththecat
OP
Original post by ko111
what would you do to move 100 to the right?

That what i forgot to do. ^^
gosh i feel dumb...:biggrin:
Reply 2
Avatar for ko111
ko111
3
Original post by moththecat
That what i forgot to do. ^^
gosh i feel dumb...:biggrin:

i confused myself lol sorry don't move 100 to the right but move r^2.
Reply 3
Avatar for moththecat
moththecat
OP
Original post by ko111
actually sorry lol that will make it harder.. try to move r^2 to the right instead of the 100.

really?
if i try this then i get 100=29.6/23.7 x r2
80.06756757=r2
8.95(2dp)= r

Right?
Reply 4
Avatar for ko111
ko111
3
Original post by moththecat
really?
if i try this then i get 100=29.6/23.7 x r2
80.06756757=r2
8.95(2dp)= r

Right?

should be right.. sub r into the original equation (not the rounded value) and see what the answer is
Reply 5
Avatar for ko111
ko111
3
Original post by moththecat
really?
if i try this then i get 100=29.6/23.7 x r2
80.06756757=r2
8.95(2dp)= r

Right?

yep just checked it's right :smile:

remember when writing your answers show all steps so you can get all the marks.
Reply 6
Avatar for moththecat
moththecat
OP
Original post by ko111
yep just checked it's right :smile:

remember when writing your answers show all steps so you can get all the marks.


Ok, thanks!
Reply 7
Avatar for ko111
ko111
3
Original post by moththecat
Ok, thanks!

no problem!
Reply 8
Avatar for ko111
ko111
3
Original post by ko111
yep just checked it's right :smile:

remember when writing your answers show all steps so you can get all the marks.

^^ so for the 1st step write (×r2\times r^2) on both sides to let the examiner know how you're trying to get r^2 on its own..

Original post by moththecat
...
(edited 9 years ago)

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