Please help and explain how you solved: Alla has $18.05 in her pocket. Write a function showing the dependence of money left (L) in her pocket after buying n markers of $0.95. Find the domain and range of the function.

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.