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blondinia [14]
4 years ago
6

A used car has a value of $15,250 when it is purchased in 2012. The value of the car decreases at a rate of 7.5% per year. Write

an exponential function that models the value of the car, y, over x years. To the nearest cent, what will be the value of the car after eight years?
Mathematics
1 answer:
stepan [7]4 years ago
4 0
Oh this is a great question. For future reference, the formula for this would be called an exponential growth or decay function, here it Is;
Y = a( 1+r )ˣ or Y = a( 1 - r )ˣ 
the answer could be found by plugging your numbers into these equations
For example: 
Y = 15,250 ( 1 - .075)⁶ 
A value = starting value of object
R value= decimal equivalent of percent increase or decrease
x value = number of years it has been

Answer : $9552.57
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A collection of nickels and quarters is worth 2.85 . There are 3 more nickels than quarters how many nickels and quarters are th
Zolol [24]

A nickel is equal to 5 cents or 0.05 dollars.

A quarter is equal to 25 cents or 0.25 dollars.

Let number of nickels be = n

Let number of quarters be = q

0.05n+0.25q=2.85    ...........(1)

As it is given, there are 3 more nickels than quarters so equation becomes,

n=q+3   ................(2)

Plug in the value of 'n' from (2) in (1)

0.05(q+3)+0.25q=2.85

= 0.05q+0.15+0.25q=2.85

0.30q=2.70

q=9

As n=q+3 we get, n=9+3=12

Hence, there are 12 nickels and 9 quarters.

3 0
3 years ago
Use angle relationships and the diagram below to write and solve an equation for x.
tatuchka [14]

Answer:

x = 7 degrees

Step-by-step explanation:

4x-5 = 2x + 9

-2x -2x

2x-5 = 9

+5 +5

2x = 14

2x/2 =14 /2

x= 7

5 0
3 years ago
This is hard can someone help ?
Anastaziya [24]

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6 0
3 years ago
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Crank

Answer:

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8 0
3 years ago
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stiv31 [10]

Answer:

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Step-by-step explanation:

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