10. The function f (x) is shown in the image box. The function g(x)is defined by the formula: g(x) = -4f(x) + 7 What is the value of g(3)? Show the calculations that lead to your answer.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )