What are the answers please

That looks like a geometric series with first term a1=100, common ratio r=1/2, or, as they seem to want to put it, dividing by two.

100, 50, 25, 12.5, 6.25,  divide by 2, it's a geometric sequence.

step-by-step explanation:

i could only see the first page. the other pages were blurry. ; -;

x hot dogs for 2$, y drinks for 3$. 29 items and total 70

2x+3y=70

x+y=29

if x=17and y=12

2(17)+3(12)=70

34+36=70