They are multiplying by two .
The answers are:
1. 35 burgers
2. 196 cheeseburgers
3. 630 burgers
4. $3.20
Answer:
x³-2x²-4x+8
Step-by-step explanation:
a1=x+2
a2=x²-4⇒q=a2/a1=x-2
⇒a3=q.a2=(x-2).(x²-4)=x³-2x²-4x+8
Maintaining the same width of the compass as AB, draw an arc from point X such that it intersects the afternoon drawn from N in a point