Its a weird way to look at the factored form but it should be 4a+8
21. I have at least $2.75
22. The second one, because there cannot be a negative number of people in a place.
hope this helps (;
Answer:
1
Step-by-step explanation:
-×-=+
-1×-1×-1×-1×-1=1
hope that this is helpful.