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You are correct. I am not sure how I did that but here is the better way. ruclips.net/video/CRaWln24H_4/видео.html

@@Bee-cu6cp take a look at the problem in the description. It is really similar one.

It does work. Solutions are (0.1,4,7.1) (0,5,6.2) and (6,6.2,8)

@@jiasstudyroom I am sorry to hear that for you. I hope you would do way better on 10B

Tell me who you are please

@@Mathlove91 I am Me 😂

@@Mathlove91 Why do you want to know?

@ I would like to know all cool people since it makes my day better

@@Mathlove91 I am 13 and I love math and tennis, how old are you?

@@SubclubYT Thank you so much. Do I know you?

@@Mathlove91 Yes...

Hi

@@Mathlove91 Hi

HI😃

I was able to find a solution using joint probability density function(PDF) but not with basic tools. I’ll see if I can do it soon. Also my discord link if you like to add.Invite expires in 1 week: discord.gg/fQpGEXvn

Here is my solution. I hope that helps. ruclips.net/video/826OcWxIFUM/видео.html

Since I have been super busy recently due to first days of school, I couldn’t have time to do more MATHCOUNTS stuff. I’ll try that soon. Thanks again for your request

@@creamy798 Since I was state coach, MATHCOUNTS shared it with me. Also I am allowed to make videos about it. Let me know if you have any questions that you would like me to make video.

@@Mathlove91 Thanks for letting me know! Also, I have a question I would like you to make a video on it’s the MATHCOUNTS 2022 National Sprint #27 I can’t find a solution without calculus. I would really appreciate it if you could. Thank you!

@@creamy798 Here you go. I hope you like it. ruclips.net/video/C3QfaTTRtnI/видео.html

@@Mathlove91 Beautiful solution! Thank you!

Did you make it to nationals?

@@Mathlove91 oh absolutely not. But I made state. And then our team placed 12/15 and then I learned a bunch of helpful formulas like 2 days after state. But we already left before they announced it bc we never win anyway. Like I placed 85th out of 179 and was told by my teacher that I placed really well. But good news is I have next year to do it and my grandfather used to be a math professor and worked for nasa. And he can tutor me. And also your videos and some other people and the official solutions that they provide

@@ElusivG I asked since I’ll be there so I was hoping to see more people who is interested in math.

@@Mathlove91 wait wait team are you on

@@ElusivG I am team coach for nv

Sure. I did two for G10 and I will do more. What grade level parctices would you like more?

Hi Diego

Please review thisfor that. ruclips.net/video/92hAg3JjqZI/видео.html

Since heights are also corresponding part of the similar triangles, area ratio is square of the ratios of the heights as well.

Thx@@Mathlove91

interesting. i still do not understand the solution though, could you help me?

@@RZR_Kakarot well obviously if you had 5 pennies, you could replace it with a nickel. If you want anything between 0 and 5 cents, use pennies, 5-24, some nickels and some pennies. Think of place values, it’s sought of like that. You can make 19 with 1+1+1… 19 times, or you could replace the 10 1’s with just a ten, so 10+9=19. Same thing in this question but in pennies, nickels, dimes, quarters

@@tonyli1439Fun fact, I have an even simpler solution. Also, I think you & the video are wrong. Hopefully, it's right: - More value = Less Amount. So, in any problem that has like, this many amounts of this, how many would he need to get this we could just simply do the highest possible value first, then the next one. The highest value first means both the highest value existing in the list and the highest value not exceeding the value we need to get and in a way that the other options can be fitted in. In this problem, we can use infinite of each coin but must find which all if used the lowest number of coins (coins, not their value) will be given. So first highest which is quarter, 1quarter=0.25$ so, any amount less than 1$=0.99$. how many quarters make 0.99$ and how much is left, 3=0.75$ is used and 0.24$ is left. now the second highest is a dime which = 0.10 so we can use 2 dimes which makes 0.24$-0.20$=0.04$ now u can not use a nickel(0.5$) so next option a penny, which = 0.01$ and 4 nickels complete the remaining 0.04$. So now the total amount of coins = 3quarters+2dimes+0nickels+4pennies=9. Also, for what u gave, (4*1)+(1*5)+(2*10)+(3*25)=1.04 For what is given in website, 3quarters=75pennies, 1nickel = 5 pennies, 2dimes=20 pennies, 4pennies=4pennies so, (3*25)+(1*5)+(2*10)+(4*1)=1.04$ Both of yours does not=the highest amount less than 1$ which is 0.99! Please do let me know if u dont understand or if it's wrong.

Please note 3 things:- 1. I have used the highest number of everything I can. 2. I have not used nickels here unlike u two, but maybe we should use everything specified, since not specifically mentioned in website not sure. 3. The option for 9 is not given here.

@@DarshanGirishKumar-fn3mewell i mean technically 0 would be a number