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Aleonysh [2.5K]
3 years ago
8

If 3x + 5y = 2 and 2x - 4y = 20, what is 5x - y?

Mathematics
1 answer:
gavmur [86]3 years ago
8 0

Answer:

= 298/11

Step-by-step explanation:

3x + 5y = 2 | ×2 |

2x - 4y = 20 | ×3 |

6x + 10y = 4

6x - 12y = 60

____________--

22y = -56

y = -56/22

y = -28/11

3x + 5y = 2 | ×4 |

2x - 4y = 20 | ×5 |

12x + 20y = 8

10x - 20y = 100

_____________+

22x = 108

x = 108/22

x = 54/11

5x - y

= 5(54/11) - (-28/11)

= 270/11 + 28/11

= 298/11

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I WILL GIVE U A CROWN.......
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<h3>Answer: Likely it's choice D) </h3>

See below for the explanation why

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down payment = 22% of home value

down payment = 22% of $426,000

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----------------

The monthly payment formula is

P = (L*i)/(1 - (1+i)^(-n))

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I'm not sure if I made a rounding error somewhere, or perhaps your teacher is using an amortization table. It's also possible your teacher made a typo somewhere. I'd ask them for clarification.  

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