III gimnazjum

Matematyka wokół nas 3

Przeliczmy wydatki poszczegoˊlnych osoˊb:   a) 28,05+4⋅8,55+121,99+2⋅121,99=428,22&lt;440 zł a) 28,05+4⋅8,55+121,99+2⋅121,99=428,22&lt;440 zł Wydatki zostały oszacowane prawidłowo.   b) 7,99+2⋅3,79+3⋅1,99+3,55+2⋅6,29=37,67&lt;75 zł Wydatki zostały zˊle oszacowane.   c) 4⋅4,99+4,19+3⋅1,54+6⋅1,39+2⋅2,29=41,69&gt;40 zł Wydatki zostały oszacowane prawidłowo.

Rozwiązanie 1

a) Koszt biletu miesięcznego: 63 zł Koszt biletów jednorazowych:  4⋅2,40⋅22=211,2

a=<svg xmlns="http://www.w3.org/2000/svg" width='0.333em' height='2.400em' viewBox='0 0 333 2400'><path d='M145 15 v585 v1200 v585 c2.667,10,9.667,15,21,15
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[231​+(0,5)2:16<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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a=0,412​:(−5<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​)2−141​   =30:5−141​

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