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vazorg [7]
3 years ago
8

The eighth-grade students at Shady Oak School took a poll about their afterschool activities. The study concluded that 75% of th

e eighth-grade students at the school currently take part in at least two afterschool activities, which is not a valid generalization. Which sample could have led the researcher to make the invalid generalization?
A.
every other eighth-grade student who was issued a report card during the fall semester
B.
an equal number of eighth-grade boys and girls picked randomly from the school directory
C.
an equal number of eighth-grade students chosen by chance from the athletic teams and school clubs
D.
every third student who enters any eighth-grade class at a particular hour of the day
Spanish
2 answers:
nadezda [96]3 years ago
6 0

Answer:

An equal number of eighth-grade students chosen by chance from the athletic teams and school clubs.

Explanation:

Leno4ka [110]3 years ago
4 0
Maybe A would be the answer... if not I tired lol
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Un niño esta reparando la llanta de su bicicleta y encuentra que la tuerca del eje central mide 5 3/4 pulgada,pero sus llaves es
RideAnS [48]

Answer:

La tuerca mide 5\frac{3}{4} pulgadas, equivalente a 146,05 mm.

Explanation:

La tuerca mide 5 3/4 pulgadas.  

Una fracción mixta es un número entero y una fracción combinadas, como es el 5 3/4. Una fracción impropia es aquella donde el numerador es mayor (o igual) que el denominador.

Para convertir una fracción mixta en impropia,  se debe multiplicar la parte entera por el denominador.  A este resultado se debe sumar al numerador.  Este número será el nuevo denominador de la fracción impropia. El denominador será el mismo que  tenía el número mixto. Entonces:

a \frac{b}{c} =\frac{(a*c)+b}{c}

En este caso:

5 \frac{3}{4} =\frac{(5*4)+3}{4}=\frac{20+3}{4}

5 \frac{3}{4} =\frac{23}{4}

Para convertir una fracción en un decimal, se divide el numerador entre el denominador. En este caso, dividiendo 23 por 4 se obtiene 5,75.

Siendo 1 pulgada=25,4 mm, se puede aplicar la siguiente regla de tres simple: si 1 pulgada equivale a 25,4 mm, 5,75 pulgadas a cuántos mm equivale?

medida en mm=\frac{5,75 pulgadas*25,4 mm}{1 pulgada}

Resolviendo:

medida en mm= 146,05 mm

<u><em>La tuerca mide </em></u>5\frac{3}{4}<u><em> pulgadas, equivalente a 146,05 mm.</em></u>

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3 years ago
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