Answer:
Step-by-step explanation:
I think the answer is number 5.
38°C is the answer to that question
15- -23
15+23
38
Please see attachment
20₃ - 11₃ = 20₃ - 10₃ - 1₃
… = 10₃ - 1₃
… = 2₃
Put another way, we "borrow a 1" from the 3¹ digits place:
20₃ = 1(3)₃ - 11₃ = 2₃
But this is just the number 2 (in base 10), which in base 2 would be 10₂.
