Raymond B. answered 10/13/20
Tutor
5
(2)
Math, microeconomics or criminal justice
C=4+D
(4/9)(C+D) = D
4C + 4D = 9D
4C = 5D
4(4+D) = 5D
16 + 4D = 5D
D = 16
C = 20 cats
Yiannis M.
asked 10/08/20A pet store only sells cats and dogs. There are 4 more cats than dogs. If 4/9 of the animals are dogs, how many cats are there?
Raymond B. answered 10/13/20
Math, microeconomics or criminal justice
C=4+D
(4/9)(C+D) = D
4C + 4D = 9D
4C = 5D
4(4+D) = 5D
16 + 4D = 5D
D = 16
C = 20 cats
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