Jeff can put shingles on a house in 9 hours while David can shingle the same house in 6 hours. If the two work together, how long would it take them to shingle the house? about 4 hours and 30 minutes
about 4 hours
about 3 hours and 30 minutes
about 3 hours

Im the following sentence, what is the complete subject . an old friend of mine is in the hospital

Which resource might provide a student who is just starting a research project with a list of credible sources of information to consult? o a. a biography of an early computer scientist o b. an article on new developments in computing o c. a book about programming languages o d. an online encyclopedia article or wiki

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