Asked by justin

The number of Roberto's baseball cards is 3/4 the number of David's cards. If Roberto gives 1/2 of his cards to David, what will be the ratio of Roberto's cards to David's cards?
Answered by Steve
r = 3d/4, or 4r = 3d

r/2 / (3d/4 + r/2) = 2r/(3d+2r) = 2r/6r = 1/3

check:

If Roberto has 12 cards, David has 16
After Robert gives David 6,

6/18 = 1/3
Answered by Anonymous
the number of roberto's baseball cards is 3/4 the number of david's cards. if roberto gives 1/2 of his cards to david, what will be the ratio of roberto's cards to david's cards?
Answered by Phoebe
steve, you are wrong,when Roberto gives half of 12to David he will have 6 and david will have 22 so the ratio is 3:11
Answered by brianna
phoebe u better be right
Answered by Nahil
Is phoebe right
Answered by Emma
Is Phoebe right??
Answered by Emily
Yes Phoebe is right
Answered by lippy
Why is math so hard :(
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