3 years ago

Are used car was purchased for 7,800 one year later it was worth 6,400 what is the percentage depreciation

Mathematics

1 answer:

sashaice [31]3 years ago

7 0

Answer:

Step-by-step explanatio 16%

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mars1129 [50]

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Help me solve this problem please

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In a family, each brother has as many sisters as brothers, but each sister has twice as many brothers as she has sisters. How ma

daser333 [38]

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4 brothers and 3 sisters

Step-by-step explanation:

Let x be the number of brothers and y be the number of sisters in the family.

1. Each brother has x-1 brothers and y sisters. If each brother has as many sisters as brothers, then

$x-1=y.$

2. Each sister has y-1 sisters and x brothers. If each sister has twice as many brothers as she has sisters, then

$2(y-1)=x.$

3. Solve the system of two equations:

$\left\{\begin{array}{l}x-1=y\\ \\2(y-1)=x\end{array}\right.\Rightarrow 2(y-1)-1=y,\\ \\2y-2-1=y,\\ \\2y-y=2+1,\\ \\y=3.$

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3 years ago

Select transform to change the drawing of the figure. Which expression could be used to find the combined area of the right and

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Step-by-step explanation:

I got it right on Edge 2021, good luck! Also if right, can you please mark Brainliest?

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