How can i find the inverse function of y=3x+2? my friend and i have different answers and we don't know who's right or wrong. i got what's in the picture.

The inverse of this function is y =

In order to find the inverse of any function, you must start by switching the y and x terms. After doing so, you can then solve for your new y. The result will be the inverse function. The work for this one is done below for you.

y = 3x + 2----> switch the x and y

x = 3y + 2 ----> subtract 2

x - 2 = 3y ----> divide by 3

= y ----> switch the order for consistency

y =

This is now your inverse function.

There are 36 different combos for the two: 6 possibilities for the first die times 6 for the second. 

Out of those 36, 10 have a sum of 9 or higher: 
3&6, 4&6, 4&5, 5&4, 5&5, 5&6, 6&3, 6&4, 6&5, 6&6

The probability is 10/36, which reduced is 5/18. 
As a decimal it is 0.2 and as a percent it is 27.%. 
Hope this helps!