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Ne4ueva [31]
3 years ago
8

Samira buys a car the car loses 23% of its value in the first year. at the end of the first year her car is worth 6575.80 dollar

s how much did samira pay for her car?
Mathematics
1 answer:
Andreyy893 years ago
6 0

Answer: Samira paid $8540 for her car.

Step-by-step explanation:

Let x = Amount paid by Samira for her car.

Given: Depreciation rate = 23%

Worth of car after one year = $ 6575.80

As per given,

x - 23 % of x = 6575.80

⇒ x - 0.23x = 6575.80

⇒ 0.77x= 6575.80

⇒ x= $8540   [Divide both sides by 0.77]

Hence, Samira paid $8540 for her car.

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Kisachek [45]
So, I'm going to break it down to help you understand it a bit more.

If it starts at (0,-2) and crosses through (1,0) that means it moved to the right once and up twice. Which means, that the slope will be 2. If it were one it would be to the right 1 up one, if it were 4 it would be to the right 1 up 4, and finally if it were 1/2 it would be to the right 2 up 1. 

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sergiy2304 [10]

Answer:

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Step-by-step explanation:

Convert this Quadratic Equation to Vertex Form by completing the square, \displaystyle y = a[x - h]^2 + k:

\displaystyle -5x^2 -10x + 6 \\ \\ -5x^2 - 10x + 25 + k \\ -5[x^2 + 2x - 5] + k \\ -5[x^2 + 2x + 1] + k → -5[x^2 + 2x + 1] + 11 → f(x) = -5[x + 1]^2 + 11 \\ \\ Vertex: [-1, 11]; 11 = Maximum

So as you can see, each time we broke the equation down, we used the formula \displaystyle [\frac{b}{2}]^2 to complete the square.

** In the Vertex Formula, −h gives the OPPOSITE terms of what they really are, so do not forget it.

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4 0
3 years ago
Andre received and spent money in the following ways last month. For each example, write a positive or negative number to repres
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Answer:

+25;+18;-10

Step-by-step explanation:

Ok so let's break down the scenario step by step:

  • His uncle gave him $25 so that means it's positive so <em>+</em><em>25</em><em> </em>
  • Now he earned $18 so that means it is also positive so <em>+</em><em>18</em>
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(And of you want to find out the amount left with him,

(25+18)-10

=43-10

=$33)

Hope this helps :)

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