Answer:
2 paintings per hour
Step-by-step explanation:
4paintings/ 2 hours= 2 paintings per hour
Just rotate it 90 degrees clockwise like this
Answer:

Step-by-step explanation:
simplify
by putting the negative sign on the outside. 
find the LCM of the denominators. It is (x-1)(x-2). Multiply by the LCM:

Simplify:

solve: 