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Debora [2.8K]
3 years ago
13

The sum of a number and its reciprocal is 61 30 . Find the numbers.

Mathematics
1 answer:
Maksim231197 [3]3 years ago
7 0
Let's say the number is hmmm "a", its reciprocal would then be 1/a
thus \bf a+\cfrac{1}{a}=\cfrac{61}{30}

solve for "a"
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Explicación paso a paso:

Debemos buscar el costo de cada boleto y la cantidad de personas que deben ir.

Dada la función que da forma al comportamiento expresado como;

f (x) = (-2x) ^ 2 + 80x + 300 donde;

x es el costo de cada boleto

f (x) es el número de personas que deben ir

Para obtener x, usaremos la expresión;

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Sustituir;

x = -80/2 (-2)

x = -80 / -4

x = 80/4

x = 20

Por lo tanto, el boleto cuesta $ 20.

Lo siguiente es obtener la cantidad de personas que deben ir. Para conseguirlo, sustituiremos x = 20 en la expresión modelada como se muestra;

f (x) = (-2x) ^ 2 + 80x + 300

f (20) = (-2 (20)) ^ 2 + 80 (20) +300

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3 years ago
In the image it appears everything
rosijanka [135]
X = -3 it's practically the y intercept in which x is equals 0
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