3 years ago

-2 - 18x = 20 what is x

Mathematics

2 answers:

Yuliya22 [10]3 years ago

5 0

X = -11/9 because math!

vazorg [7]3 years ago

5 0

The awnser is x equals -11/9 solve for x by simplifying both sides of the equation then isolating the variable

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Explicación paso a paso:

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Dada la función que da forma al comportamiento expresado como;

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x es el costo de cada boleto

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

Para obtener x, usaremos la expresión;

x = -b / 2a

De la ecuación cuadrática dada, a = -2, b = 80 yc = 300

Sustituir;

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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

f (20) = (-40) ^ 2 + 1600 + 300

f (20) = 1600 + 1600 + 300

f (20) = 3500

Por lo tanto, 3500 personas tienen que ir

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