Answer:
subtraction
Step-by-step explanation:
x +15 = 9
-15 = -15
x = -6
Answer:
choice b because it is constantly going up the same amount.
2/5 + 2/4
8/20 = 10/20
8/20 + 10/20 = 18/20
18/20 = 9/10
9/10 = 0.9
Your answer is 9/10 or 0.9
Hope I helped!
Let me know if you need anything else
~ Zoe

+

First, simplify the brackets. / Your problem should look like:

-
Second, simplify. / Your problem should look like:

Answer as fraction:

Answer as decimal: 0.8462