The ratio of the number of cups of blue paint to the number of cups of red paint that Lara mixed to make a shade of purple paint is 3:1.
Part A: Write a sentence to describe the number of cups of blue paint that Lara mixed with each cup of red paint. (4 points)
Part B: How many cups of red paint should Lara add to each cup of blue paint to make the shade of purple? Explain your reasoning. (4 points)
Part C: If Lara purchased 6 cups of blue paint for $48, what is the unit price per cup of blue paint? (2 points)

- anonymous

- jamiebookeater

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- anonymous

- anonymous

ratio is 3:1, so for every 1 cup of red she added 3 blue

- anonymous

that answers a and b, and to get c you divide 48 by 6, which is $8

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## More answers

- welshfella

b asks how many cups of red paint must be added to 1 cup of blue paint to make purple paint.
The answer to that is since the ratio of blue to red is 3:1 then the ration of red to blue is 1:3. So for each cup of blue you ad 1/3 of a cup of red.

- welshfella

ooops sorry thats 1/4 of a cup of red.

- welshfella

! : 3 = 1/4 : 3/4

- anonymous

no its 1/3
sorry i didnt understand the question

- welshfella

Not 1/3 because that would make the ratio 1/3 to 2/3 which is 1 to 2.

- anonymous

@welshfella its one third cup, because 3:1 simplifies to 1: 1/3

- anonymous

lol

- anonymous

lets see who right @ganeshie8

- welshfella

think about it there are 4 parts in 1:3
so if the whole is 1 then 1 is equivalent to 1.4 and the 3 is equivalent to 3/4

- welshfella

* 1/4

- anonymous

hold on let me ask google. he knows everything

- anonymous

@Michele_Laino can you help us out here?

- welshfella

|dw:1440528969974:dw|

- welshfella

3 : 1 is equivalent to 1/4 of red and 3/4 of blue

- anonymous

oh im really sorry, for some reason i didnt get the rtio right. youre correct

- welshfella

believe me!

- anonymous

im sorry for causing trouble peaches

- anonymous

@lol no dat was funny lol @moudown828

- welshfella

- no trouble . As long as we all finally agree.. lol

- anonymous

haha yea im sorry for being slow

- welshfella

no need to apologise.

- anonymous

lol so wats da answer u guys had confused me

- anonymous

nnmd got it thx @welshfella and @moudown828 4 yo help

- anonymous

welshfella has the right on. youre welcome

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