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Monica [59]
2 years ago
5

There are 12 boys and 16 girls in Marco's class (including Marco). What is the probability that a student chosen at random from

Marco's class will be a boy? 4/7, 3,7, or 2/5.
Mathematics
1 answer:
qaws [65]2 years ago
3 0

Answer: 3/7

Step-by-step explanation:

There's 28 student total.

12/28 simplify to 3/7

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Answer:

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Step-by-step explanation:

In order to find the inverse of the equation, we do a variable change, since we are finding the inverse, :

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Now solve for y'.

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Second divide by 9

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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}

f^{-1}(x)  = \frac{\sqrt{x+4}}{3}

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)

You will have

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

=x

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