Suppose that a radioactive particle is randomly located in a square with sides of unit length. a reasonable model for the joint density function for y1 and y2 is f(y1,y2)= 1, 0≤y1≤1,0≤y2≤1, 0, elsewhere. a what is e(y1−y2)

The answer would be 5< 6n

The answer would be c.8(2)=16-16=0 -8(2)=16-16=0

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!