Well if you have 60 and she has 120 i will set it out as a sequence week by week 60,67,74,81,88,95,102,109,116,123,130,137,144,151,158,165,172,179,186,193,200,207,214,221,228,235,242,249,256,263,270 120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,195,200,205,210,215,220,225,230,235,240, 245,250,255,260,265,270 it would take 31 weeks and the total is 270
The variable “x” can be defined as the price of regular gas. The equation is x = x - (.02)7 x = x - (.02)7 (.02)7 = .14 x = x - .14 X - X = nothing so it just leaves you with -.14 The answer is that the gas price changed by a total of - 14 cents or -0.14