I think the answer is possibly B or D
Answer:
the answer would be 20
Step-by-step explanation:
so if 18-(-2)=?
two nwgatives make a positive. So the equation would turn into 18+2=20
Im not 100% if this is right but htis is how I was taught to do it.
7 - N (replace N with 34)
7 - 34
- 27
The answer is - 27

- Increase = 20 - 15 = 5 points
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