Maththis doesn't make any sense to me. pls me. i'm not begging, but this problem has been stumping me and i don't understand how to do i'm using 99 points to give to a person who maybe can me. i will give brainliest if you are correct. you so very kindly. when julia dumped out the big jar of dimes and nickles she found 287 coins. if there was $20.50 in the jar, how many of each kind of coin was there? ? don't answer this unless you actually are answering the ! if you have any questions, or it doesn't make sense, say something in the "ask for details" section. thanxs !

First, you want to solve for the equation for this problem, would be: 

0.05N + 0.10D = 20.50 

While N = The amount of nickels, and D = The amount of dimes. 

Since N = 164, and D = 123. It would add up to 287 coins. 164 + 123 = 287. 

Now that you have the number for those two variables, solve the equation for when N = 164, and D = 123. 

0.05N + 0.10D = 20.50 

0.05(164) + 0.10(123) = 20.50 

8.2 + 12.3 = 20.50 

20.50 = 20.50 

So, there is 164 nickels, and 123 dimes for your answer. 

I hope this helps you

360 different combinations

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315