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Dad is 4 times as old as his son Jim. In 10 years, Dad's age will be 20 years more than twice Jim's age. How old is Jim? 10 years old 15 years old 30 years old
answered Feb 26, 2017
4 votes
57.4k views
amylase increases the rate at which starch is broken down into glucose. what kind of molecule is amylase?
answered Aug 15, 2016
5 votes
108k views
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