If the pattern below follows the rule starting with two every consecutive line has a number that is one lee than twice the previous line how many marbles must be in the sixth line

the perimeter is increased by a factor of 2

i got 142 as my answer

step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.