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emmainna [20.7K]
2 years ago
6

Miss Pacheco, Mr. Edwards and Mr. Richards are three math teachers at a Turner middle school. Miss Pacheco is three years older

than Mr. Richards. Mr. Edwards is twice as old as Mr. Richards. The sum of Mr.Richards age and mr. Edwards age is 81. How old is each person ?
Mathematics
1 answer:
xenn [34]2 years ago
6 0
Pacheco=57
Richards=54
Edwards=27
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liraira [26]

No hay solución en la que ambas trayectorias estén en la misma posición, puesto que no existe el riesgo de que sufran un choque entre ellos.

-------------------------

La trayectoria del primero es:

-x + 2y - 100 = 0

x_1 = 2y - 100

Para el segundo, tiene-se que:

-x + 200 + 2y = 0

x_2 = 2y + 200

Igualando los valores de x:

x_1 = x_2

2y - 100 = 2y + 200

0y = 300

No hay solución en la que ambas trayectorias estén en la misma posición, puesto que no existe el riesgo de que sufran un choque entre ellos.

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Step-by-step explanation:

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HELP PRETTY PLEASE THIS IS URGENT NEED IN THE NEXT HOUR!!
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Answer:

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Step-by-step explanation:

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7 0
2 years ago
The population of a certain animal species you are studying decreases at a rate of 3.5% per year. Only 80 of the animals in the
balu736 [363]
The function:
f ( x ) = x * 0.965^t
where x is the initial amount and t is the number of the years
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80 = x  *  0.89632
x = 80 : 0.89632 ≈ 89
Answer:
The initial amount of animals was 89.
3 0
3 years ago
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