3. 572/1000 4. 9 23/1000 5. 45/100000 6. 9 875/1000
5x+y= -5 , i hope I help you
When each x value has only one y value, the relation is a function
Y=9.25 because inorder to solve this we need to first take 5*.3 which equals 1.5 now that we have this we can move on we now have the equation 1.5 + 2y = 20 so now we need to continue working on getting y by it self so we subtract 1.5 from each side and then that leaves us with 2y=18.5 now we divide by 2 which leaves us with y=9.25 enjoy=)
