80+10x is the expression. To find the cost for 9 guests, simply plug in 9 for x. This becomes an equation reading 80+10(9)=170. The total cost for 9 guests is $170.00.
hence, the common ratio of the given G.P. is 3 or −3.
One will be c
and 2 will be b
It is 30000 i think dang it
