The Addition Property of Equality justifies Emily's first step. She added 9 to both sides, canceling out the minus 9 while keeping the equation equal.
13.02 Multiply 12 by 0.085, which is 8.5% in decimal form. You get 1.02. Add that to your original price, 12, and you get $13.02
It's just dividing out the factoring to their simplest form.
The bold numbers are the answers that go in the circles.
1. 16 < 8 and 2
8 < 2 and 4
4 < 2 and 2
2. 42 < 14 and 3
14 < 7 and 2
3. 40 < 2 and 20
20 < 10 and 2
10 < 2 and 5
4. I'm not able to see the rest of the factoring tree
B is the corrrect answer hope it helps
