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27 July, 23:03

Sam is doing his math homework. Hey completes 10 probelms every 30 minutes. How many porbelms can sam complete in 60 minutes?

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  1. 27 July, 23:09
    0
    Put the ratios into fraction form. Since you do not know how many problems, replace it with an unknown number a. k. a. a variable.

    10/30 = x/60

    Since you can get 30 to 60 by multiplying by 2, multiply everything on the left side by 2.

    Then, you get 20/60, which means 20 = x. So, he can complete 20 minutes an hour.
  2. 27 July, 23:17
    0
    He can complete 20 problems in 60 minutes
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