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Yanka [14]
3 years ago
15

Si a una persona le deben 7/9 de $450000 y sólo le cancelan 3/5 de esa deuda. ¿Cuánto dinero le quedan debiendo?

Mathematics
1 answer:
Vlada [557]3 years ago
6 0

Answer:

$140,000

Step-by-step explanation:

Paso 1

Si a una persona le deben 7/9 de $ 450,000

La cantidad que se le debe a la persona se calcula como:

7/9 × $ 450,000

= $ 350,000

Paso 2

Solo se cancela 3/5 de esa deuda.

El monto de la deuda que se cancela se calcula como:

3/5 × $ 350,000

= $ 210,000

Paso 3

Por lo tanto, la cantidad de dinero que debe se calcula como:

$ 350,000 - $ 210,000

= $ 140,000

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Answer: 0=2x^2-7x-9\\0=4x^2-3x-1\\0=x^2-2x-8


Step-by-step explanation:

We know that the standard quadratic equation is  ax^2+bx+c=0

Let's compare all the given equation to it and , find discriminant.

1. a=2, b= -7, c=-9

b^2-4ac=(-7)^2-4(2)(-9)=49+72>0

So it has 2 real number solutions.

2. a=1, b=-4, c=4

b^2-4ac=(-4)^2-4(1)(4)=16-16=0

So it has only 1 real number solution.

3. a=4, b=-3, c=-1

b^2-4ac=(-3)^2-4(4)(-1)=9+16=25>0

So it has 2 real number solutions.

4. a=1, b=-2, c=-8

b^2-4ac=(-2)^2-4(1)(-8)=4+32=36>0

So it has 2 real number solutions.

5. a=3, b=5, c=3

b^2-4ac=(5)^2-4(3)(3)=25-36=-9

Thus it does not has real solutions.



5 0
3 years ago
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Step-by-step explanation:

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3 years ago
The bus fare in a city is 1.75 . People who use the bus have the option of purchasing a monthly coupon book for . With the coupo
lorasvet [3.4K]

Answer:

26 times

Step-by-step explanation:

Given

Without Coupon

Rate = 1.75 per trip

With Coupon

Coupon = 26

Rate = 0.75 per trip

Required

The number of trips to be taken for both option (i.e. with or without coupon) to be equal

<em>See comment for complete question</em>

Let the number of trips in a month be x.

<u>Without Coupon</u>

Total amount is:

Total = Rate * x

Total = 1.75x

<u>Without Coupon</u>

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Total = Coupon + Rate * x

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Collect like terms

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3 years ago
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