If I did this wrong pls help me !

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

3 0

Always try to simplify prior graphing. However you have to mention where the function is continued or discontinued.

We notice that the numerator is a quadratic equation. Is roots are :
x = -2 and x" = 10
Then the numerator could be written (x+2)(x+10) and the function:
y= (x+2)(x+10)/(x+2). Prior to simplifying, you should notice that this function is discontinued for x = -2 (doesn't exist), so the domain is all x# -2.
Now you simplify and you will get:
y = (x-10) , which is a linear function, but cannot be at x = -2

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The best option is to take the 100 points because the expected value of the points from the scratch-off card is less than 100 points option (A) is correct.

<h3>What is probability?</h3>

It is defined as the ratio of the number of favorable outcomes to the total number of outcomes, in other words the probability is the number that shows the happening of the event.

Since, there is an equal number of cards of point 25, 100, and 120

P(x =25) = P(x =100) = P(x =200) = 1/3

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The expected value is:

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