Can someone me with this?
you

<x = 78°

Step-by-step explanation:

<y = 115 so <B = 180 -115 = 65

<z = 323 so <C = 360 - 323 = 37

<x = 180 - (B + C)

<x = 180 - (65 + 37)

<x = 78

The probability of two independant events   and  can be found by multiplying the individual probabilities like so:

For each individual probability we can find the answer via a simplfied representation: 


For the first stone (orange) we have:


For the second stone (green) we have:
 
**(Notice that the total is still 18 since he put the first one back in the jar before drawing the second.)

So: