Luke’s older brother joined a gym. He paid a one-time membership fee of $49 and is paying monthly dues of $25. Which of the following expressions can be used to show how much Luke’s brother will pay during his first full year at the gym?

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.