The resale value of a textbook decreases by 25% with each previous owner. a new textbook is sold for $85. which function represents the resale value of the textbook after x owners? f(x) = 85(1 – 0.25)x f(x) = 85(1 + 0.25)x f(x) = 85(0.25)x f(x) = (85 – 0.25)x

The first function is the answer

Since the value decreases by 25% each time, the next cost is the current cost times 0.75 (since new cost is 75% of current cost).to find the value of the book after x times sold, you can use:   just plug in the number of times it is resold to find the value.or you can do it this way a exponential function would represent it nicely f(x)=b*a^xreason being a decrease of %a = 1+rr = -25% = -0.25and b being what the original cost of the bookf(x)=85*0.75^xwhere f(x) is the price after x amount of previous owners

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

What are the choices