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ollegr [7]
3 years ago
9

The 2006 value of a car was $18,000. In 2016, it was worth $4000. If the annual percent of decay has been constant, what is the

annual percent of decay? Please show your work!
Mathematics
1 answer:
MArishka [77]3 years ago
7 0

Answer:

7.77% per year

Step-by-step explanation:

From 2006 to 2016 the price of the car went from $18.000 to $4.000. So it lose 77.77% of its value in 10 years.

To know the total percentage of decay in 10 years we use the rule of three.

If $18.000 represents %100

What percentage does $4000 represents?

($4000 * 100 / $18.000) = 22.22%

If the final value is 22.22% of the initial value, then it lose 77.77% of its value. (100% - 22.22% = 77.77%_

Given that the percent of decay was constant, the annual percent of decay is: 77.77% / 10 years = 7.77% per year.

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3 years ago
Kenny wants to learn how to serve overhand in volleyball. When he practiced yesterday, he made 7 serves over the net for every 2
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Answer: 28

Step-by-step explanation:

Given

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for 36 serves, applying the same success rate, it is

\Rightarrow \text{success rate}=\dfrac{700}{9}\times\dfrac{1}{100}\times 36=28

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3 years ago
.Shanice and Micaela are selling cheesecakes for a school fundraiser. Customers can buy pecan
belka [17]

Answer:

Pecan cheesecake = $11

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Step-by-step explanation:

To solve this, we will need to set up a system of equations:

Let's call "Pecan cheesecakes" 'x', and

"Strawberry cheesecakes" 'y'.

We can set up the equations once we have our variables:

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We will need to subtract these equations from each other to get rid of the 'x' variable. This gives us:

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Therefore, Strawberry cheesecakes cost $19. Plug this into an equation to get the value of 'x':

276= 13x + 7(19)

276 = 13x + 133

143 = 13x

x= $11.

Therefore, Pecan cheesecakes cost $11.

8 0
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C. And it would be a equilateral
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Step-by-step explanation:

1/2 of 8 is 4. 22 times 4 is 88.

8 0
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