Es there are 30 students on the debate team and 20 students on the math team. ten students are on both the math team and
debate team. what is the total number of students on either team?
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Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Which of the following is the result of expanding the series

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?