GYanggg

To find the expected value, we do this:

(20/100)*5 + (80/100)*2 = 13/5

13/5 is the expected value. 

This means, that the special ticket should cost 13/5 more than the regular ticket to cover the cost of the refunds.

If you need help with expected values problems, you should watch this video explaining how to find the expected value:

https://m.youtube.com/watch?v=DAjVAEDil_Q

hope this helped!

If you are trying to find the mean, or average, of the numbers, I can help you! 

To find the mean, you add up all the numbers in the list, and divide the total by how many numbers there are in the list. 

Adding the numbers in the list, we have:

4 + 3 + 5 + 12 + 13 +16 = 53

Then we divided 53 by the total numbers there are in the list, which is 6

53 / 6 is rounded up to 9.

The answer you are looking for is 9.

A simile is comparing something to something else using the words like or as. 

The Sun was like a burning ball in the sky.

The blizzard covered the ground with snow as white as cotton. 

You may compare a dusty book with almost anything, use your imagination!

It looks fine to me!

The amount of dollars Patty paid extra is 15 - 12 = 3.

So 3 dollars is the tip Patty paid. 

Now we need to what percentage of 12 is 3.

3/12 = 0.25 

So the answer you are looking for is 25 percent.

I'm pretty sure that this equation is missing some things. 

First of all, a sigma notation must have a range, from n=x to k

This is missing the range, so this problem is undoable.

I can help you if you repost with the missing values. 

We first need to find the area of the shaded region. 

The width is 3 + 1 + 2 = 6 

The length is 2 * 5 = 10

The total area of this rectangle is 6 * 10 = 60 

The shaded region has a total area of: 

3 * 2 + 2 * 2 + 2 * 1 = 12 

The part of the rectangle that is not shaded must be 60 - 12 = 48

The probabilty is 48/60 = 4/5 = 0.8 = 80%

Yay! I like that we have the same answer. This was hard, was wondering if I was right...

Oh my god! Happy Birthday Melody. Thank you for all the contributions to this amazing math website. I wish you the best day ever!

I don't know how to insert images or program in desmos as well as hectictar, but still, happy birthday!!!

:)