Answer:
I think it's the last one! In an experiment, one group is studied over a short period of time---
Answer:
178
Step-by-step explanation:
For the 1 first problem you have to do additive inverse where the subtraction sign is and then combine all the z's and then combine the normal numbers and then put plus sign in between
If the 0 is in the numerator, the value is 0
if the 0 is in the denominator, the value is undefined
so 0/8 = 0
and 3/0 = undefined
