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ryzh [129]
3 years ago
11

If dan has $3.75 and he spends 1/3 of it how much does he have left

Mathematics
2 answers:
Alekssandra [29.7K]3 years ago
8 0
The answer is $2.50 :)
olga_2 [115]3 years ago
3 0
3.75 divided by 3= 1.25
3.75-1.25= 2.50
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Which equation is the inverse of y = 9x2 - 4?
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In order to find the inverse of the equation, we do a variable change, since we are finding the inverse, :

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y = 9x^{2} - 4

x = 9y' ^{2} - 4

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Now you will have to clear y, with the square root.

[tex]y'^{\frac{2}{2}} = \sqrt{x + 4}  / \sqrt{9}[/tex] =

Simplifying terms

y' = \frac{\sqrt{x+4}}{3}

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You can check the answer by doing the evaluation of the following equation:

(f o f^{-1} ) (x)

substitute the equation for y' or inverse function f^{-1}

f(\frac{\sqrt{x+4} }{3})

Now substitue the value into f(x)

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= 9(\frac{\sqrt{x+4} }{3}} )^{2}  - 4\\\\Solving\\\\9(\frac{{x+4} }{9}} )  - 4

=x

5 0
3 years ago
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