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Airida [17]
2 years ago
6

Mary runs 4 laps in 8 minutes.Nicole runs 12 laps in 18 minutes.Who runs the fastest?

Mathematics
2 answers:
frozen [14]2 years ago
5 0
\frac{4}{8} =  \frac{x}{1}

4/8 or 1/2 laps per minute 

\frac{12}{18} =  \frac{x}{1}

12/18 or 2/3 laps per minute 

Nicole ran the fastest 
Ugo [173]2 years ago
3 0
4/8 is mary and it is 0.5
12/18 is nicole and it is .6666
mary runs faster
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Hiros family lives 448 kilometers from the beach.Each of the 5 adults drove the family van an equal distance to get to and from
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8 0
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El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar todas las cartas. A su compañ
vodka [1.7K]

El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar todas las cartas. A su compañera rosabel, le toma 9 horas en realizar la misma tarea. Si ambas trabajan juntas para hacer todo el trabajo d ela oficina,

a. Cuánto tiempo le tomará a ambas realizar el trabajo?

Answer:

3.6 horas

Step-by-step explanation:

Sea el número total de horas que ambos trabajaron = T

Deje que la cantidad total de letras por las que pasaron = 1

De la pregunta, se nos dice:

Lourdes necesitó 6 horas para revisar las cartas.

Esto significa que, cada 1 hora, Lourdes revisaba 1/6 de las letras

Rosabel tardó 9 horas en leer las letras.

Esto significa que, cada 1 hora, Rosabel revisó 1/9 de las letras

Por lo tanto,

(1/6 × 1) T + (1/9 × 1) T = 1

(1/6 + 1/9) T = 1

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Cruz multiplicar

5T = 18

T = 18/5

T = 3.6 horas

Por lo tanto, les tomó a ambas 3.6 horas hacer el trabajo.

7 0
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