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erma4kov [3.2K]
3 years ago
10

PLz DO it all I will give brainlest and thanks.

Mathematics
1 answer:
dolphi86 [110]3 years ago
8 0
That’s the answers. Hope this helps

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Worker A finishes the job in 10 hours; worker B finishes it in 12 hours, and worker C finishes it in 15 hours.
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A=1/10, b=1/12, c=1/15  (these are the rates for each worker...)

1.)

2(1/10)+4(1/12)+t/15=1

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So it would take c 7 hours to finish the job.

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If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen
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Question 3 of 5
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Answer: 8

72π=226.19

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Responder:

70%

Explicación paso a paso:

probabilidad de seleccionar aleatoriamente a un participante que haya obtenido entre 71 y 85 puntos:

Probabilidad = resultado requerido / Total de resultados posibles

Resultados posibles totales = Sumando la frecuencia para obtener el número total de estudiantes = (9 + 12 + 12 + 18 + 9) = 60 estudiantes

Resultado requerido:

Clase :

(71 - 75) = frecuencia = 12

(76 - 80) = frecuencia = 12

(81 - 85) = frecuencia = 18

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