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3 years ago

A class has a total of 135 absences over 18 weeks. what is the mean number of absences per week?

Mathematics

1 answer:

Butoxors [25]3 years ago

5 0

135 divided by 18 is 7.5 so I would guess 7 each week and maybe possibly 8 on some weeks

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Fynjy0 [20]

$\text{Answer: }1\frac{23}{40}\ miles\text{ far she live from school.}$

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Since we have given that

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$\frac{x}{3}+\frac{x}{7}=\frac{45}{60}\\\\\frac{7x+3x}{21}=\frac{3}{4}\\\\\frac{10x}{21}=\frac{3}{4}\\\\x=\frac{3\times 63}{4\times 10}=\frac{63}{40}=1\frac{23}{40}\ miles.$

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