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The sum of the ages of John and mary is 32. Four years ago, John was twice as old as mary . Find the present age of each
asked
Oct 10, 2020
Mathematics
middle-school
1
answer
3
votes
41.8k
views
What is 4.5 multiply 3.5
asked
Feb 23, 2020
Mathematics
middle-school
2
answers
4
votes
138k
views
Explain where the electron comes from and how it gains energy during the light reactions.
asked
Oct 17, 2019
Physics
college
1
answer
3
votes
120k
views
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