Answer:
Step-by-step explanation:
2(20 + 22) = 2(42) = 84 total books
0 because the number in the middle is the midpoint.
A is true--------------------------
C
By subtracting 18 to both sides you are separating the 3x because you are not ready to isolate the variable (x) in step 1
Answer:(3x-7) (3x-7)
Step-by-step explanation:
9x2-42x+49
The two by the 9 is power of 2 so the small two above