The answer is B. 6, 18, 54, 162.
A geometric sequence is a when a group of numbers are multiplied by another number. Each number in answer B is multiplied by 3.
6*3=18
18*3=54
54*3=162
X = 10
to find x -
7x = 8x - 10
180 - 70 = 110
110 = 6y + 20
y = 15
Make an equation:
6x + 12 = 268.26
6x = 256.26
X = $42.71
The monthly payment is $42.71