What are the coordinates for the image of point n, when the figure is translated 3 units to the right and 3 units up?

1) (1,2) translated two units to the left would be (-1,2)...right? "Translated two units left..." means move horizontally - the negative x direction - 2 units. 
"Reflect over the x-axis" means you pretend the point (-1,2) is fastened to the x-axis by a pivoting rod and you just flip it over the horizontal... the x-axis. You'll end-up at (-1,-2) 
2) (2,-4). Let's see: over 2 units to the right, down 4 units. Flip it over the x-axis: (2,4) 
3) The mid-point will be the point with (x,y,z) values equal to the average of the given 2 x's (7 and -3... the average is 2), the 2 y's (3 and 1 => a y-value of 2) and the average of the 2 z's ( -4 and 0 yield an average of -2) The mid-point is (2,2,-2) 
4) Just increase the y-value by 3: You get (2,2) 
5) Every coordinate value becomes 3 times the original. (5,-1) becomes (15, -3) 
6) (5,2) translated down 4 units is (5,-2. (5,-2) translated translated left 1 unit is (4,-2) 
hope this helps