Answer:
The next three terms of the sequence 99, 89, 69, 39, -1 is -51, -111, -181.
99, 89, 69, 39, -1, -51, -111, -181.
Step-by-step explanation:
You need to add negative numbers:
99 + (-10)=89
89 + (-20)=69
69 + (-30)=39
39 + (-40)=-1
-1 + (-50)=-51
-51 + (-60)=-111
-111 + (-70)=-181
The underlined numbers are the next three terms.
