How many different 2-digit numbers are there with the following property: the tenth digit is greater than the units digit? Help please!

you get Assuming you mean second when you say tenth the answer is 36

Step-by-step explanation:

Ok so if the units digit is 1, then there are 8 posibble bigger digits: 2,3,4,5,6,7,8,9

if the units digit is 2, then there are 7 possible bigger digits: 3,4,5,6,7,8,9

and so on...

8+7+6+5+4+3+2+1+0

which equals 36

im only in 5th grade dont blame me if im wrong

wait im working on it i got the answer before

Step-by-step explanation:

only 10/60 isn't equivalent

hope this : )

other answer is correct. i had used the radius of the radius somehow. a website: