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Flauer [41]
3 years ago
6

a(0.3−y)+1.1+2.4x= 0 (y−1.2)=−1.2(x−0.5) Consider the system of equations above, where a is a constant. For which value of a is

there exactly one (x, y) solution where y = 1.3y? Round your answer to the nearest tenth.
SAT
1 answer:
Fantom [35]3 years ago
5 0
What are the choices?
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Un camión traslada 12 vehículos. Algunos son autos y otros son camionetas. Cada auto tiene una masa de 2 toneladas y cada camion
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Encontrando y resolviendo un sistema de ecuaciones, veremos que hay 9 camionetas y 3 autos.

Sabemos que hay 12 vehículos en el camión.

Definamos:

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tal que a + c = 12

La masa total será:

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Y sabemos que el camión lleva 33 toneladas, entonces tenemos:

a*2 ton + c*3 ton = 33 ton

Así encontramos el sistema de ecuaciones:

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Para resolverlo, primero aislamos una de las variables en una de las ecuaciones, aislemos a en la primera:

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Ahora reemplazamos esto en la otra:

(12 - c)*2 ton + c*3 ton = 33 ton

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c*1 ton = 9 ton.

c = 9

Es decir, hay 9 camionetas.

Entonces los 3 vehículos restantes son autos.

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