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tigry1 [53]
3 years ago
9

What 2 numbers multiply to get 20 and add to negative 9

Mathematics
1 answer:
madreJ [45]3 years ago
8 0
-5 and -4. 
-5 times -4 is 20 while adding -5 and -4 it equals -9. (don't be very harsh if i got this wrong)
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Answer:

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Step-by-step explanation:

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3 years ago
Juan paga por un saco S/ 224, después de que le han
grigory [225]

El saco tiene un precio original de 400 soles.

<h3>¿Cómo determinar el precio inicial de un saco comprado con descuento?</h3>

En este problema tenemos el caso de un precio de compra (P'), en soles, que es resultado de aplicar dos descuentos consecutivos al precio original del saco (P), en soles. El precio es el resultado de multiplicar el precio original por los dos factores de porcentaje, descrito por la siguiente fórmula:

P' = P · (1 - r₁ / 100) · (1 - r₂ / 100), 0 ≤ r₁, r₂ ≤ 100.

Donde:

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Si sabemos que P' = 224, r₁ = 30 y r₂ = 20, entonces el precio original del saco es:

224 = (1 - 30 / 100) · (1 - 20 / 100) · P

224 = 0.7 · 0.8 · P

P = 224 /(0.7 · 0.8)

P = 400

El precio original del saco es de 400 soles.

Para aprender más sobre descuentos: brainly.com/question/24130820

#SPJ1

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Your answer would be w-6=(number of black socks)
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Step-by-step explanation:

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