In the following problem, which step uses the additive identity to get to the next step.
1. -18+73+18
2. -18 +18+73
3. 0+73
4. 73
step 1, 2, 3, or 4?

After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? check all that apply. a. 9% + 3x2 = 14 + x-1 b. -x+ + 4x + 7 = -32-9 c. 5x + 4 = 3x4 - 2 d. 2x2 + x2 + x = 30

What rotation was applied to triangle def to create d’e’f’?

What is the sum of these mixed numbers 4 2/3+ 3 1/9