math
posted by danielle on .
james is making fruit juice, using fruit cordial and water.
the label on the cordial says "to make 1 litre of fruit juice, use 200 ml of cordial and 800 ml of water"
james uses 250 ml cordial and 850 ml of water.
is james using the correct proportions?
show working to justify answer.

Let x equal the amount of water needed.
200/800 = 250/x
200x = 200,000
x = 1,000 ml 
sorry do you mind if i just ask you another as i'm really stuck with these questions thanks.
here is a list of ingredients you need to make 20 peanuts. 100g butter
50g sugar
150g flour
50g peanuts
a)list the ingredients you need to make
10 cookies
50 cookies
b) eva wants to make some cookies.
she has bought a 200g bag of peanuts.
a) how many peanut cookies can he make with this bag of peanuts.
b) how much of each of the other ingredients will he need?
sorry for this! 
sorry if its so long but could you please explain

I don't know what this means:
"here is a list of ingredients you need to make 20 peanuts. " 
the 100g butter
50g sugar
150g flour
50g peanuts 
since she bought 200g peanuts, that's 4 times as much as she needs for one batch of 20 cookies.
So, multiply all the other amounts by 4 to use up all the nuts and make 80 cookies. 
sorry how do you do the start of the question about the 10 cookies and the 50 cookies

Does the problem state the ingredients for 20 cookies or peanuts?

well the cookies are peanut cookies

a) Cut the ingredients in half to make 10 cookies.
Multiply the ingredients for 10 cookies by 5 to make 50 cookies.
b)
200/4 = ?