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Mathematics, 17.09.2019 01:10 autumnstalvey67
Randy can rebuild an automobile engine in a hours. alvin can rebuild the same engine in b hours. if randy and alvin work together at their respective rates to rebuild the engine, which of the following represents the portion of the job that randy will not have to complete?
a. ab/(a+b)
b. (a-b)/(a+b)
c. b/(b-a)
d. a/(a+b)
e. b/(a+b)
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Randy can rebuild an automobile engine in a hours. alvin can rebuild the same engine in b hours. if...
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