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Neporo4naja [7]
3 years ago
9

How to solve for x: 2x+y=3 and x+y=9

Mathematics
2 answers:
bearhunter [10]3 years ago
5 0
X+Y=9; X=9-Y; 2X+Y=3; substitute above equation for X; 2(9-Y)+Y=3; 18-2Y+Y=3; 18-Y=3; 18=3+Y; 15=Y; X+Y=9; X+15=9; X= -6; 2X+Y=3; 2(-6)+15=3; -12 + 15 = 3; 3 = 3;
Ivenika [448]3 years ago
3 0
The answer for the first one would be: y=3-2x
The answer for the second one would be: y=9-x
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pickupchik [31]

Hi Donovan,

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¿En cuánto se convierte un capital de C=$8,000 después de n=5 años a una tasa de interés compuesto del i=10% anual?
slava [35]

Evaluando una ecuación exponencial, veremos que luego de 5 años el capital se convierte en $12,884.08

<h3>¿En cuánto se convierte el capital?</h3>

Esta situación se podra modelar con la ecuación exponencial:

f(n) = $8,000*(1 + 10%/100%)ⁿ

Donde n es el número de años.

Podemos simplificar la ecuación para obtener:

f(n) = $8,000*(1.1)ⁿ

Ahora queremos ver el valor que toma esto cuando n = 5, asi obtenemos:

f(n) = $8,000*(1.1)⁵ = $12,884.08

Así que luego de 5 años, el capital se convierte en $12,884.08.

Sí quieres aprender más sobre ecuaciones exponenciales:

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Megan bought 3 pounds of apples that cost x dollars per pound. She gave the cashier a 20 dollar bill. Which equation could Megan
nata0808 [166]

Answer:

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