Combine like terms first (so like the ones that have x with x and someone please help them bc I explained it bad
48 divide by 4 sides = 12
12 x 12 = 144cm squared
-9+4=5 because two negative signs makes a positive
Answer:

Step-by-step explanation:

Answer:


Step-by-step explanation:



The interval notation will be:

The contrary,

is 