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buky0910p6db44
14.07.2019 •
Mathematics
20 the following table shows the number of students in a class who participate in art and sports: participate in art do not participate in art total participate in sports 40 ? 70 do not participate in sports 10 5 15 total 50 35 85 what is the missing number in the table?
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Ответ:
You are asked to find the missing value in
... 40 + ? = 70
given that it is also the solution to
... ? + 5 = 35
Either way, you subtract the constant that is on the same side of the equation as the unknown.
... 40 + ? - 40 = 70 - 40
... ? = 30 . . . . the missing value
You can check to see if this also satisfies the equation
... 30 + 5 = 35 . . . . . . . true
Ответ:
30
Step-by-step explanation:
6 x 5=30