1. is C because it says sum, which means add. 2. is B because we had to add 6+3 to make it equal 3. We can input 6 into h and get 19, when used with the rule of PEMDAS. 4. For perimeter we just have to add all sides, the answer is 128. 5. We have to multiply that by 4 to get the perimeter. Answer is 76.
What you have to find is LCM(least common multiple in order to find the lcm all you have to do is list all the multiples and find their common multiple.
