Cost of a Taxi Ride in a certain city, a taxi ride costs 75 cents for the first of a mile and 100 cents for every additional of a mile after the first seventh. If x is the number of additional sevenths of a mile, then the total cost C(x) of a taxi ride is C(x) = 10x + 75 (a) How much does it cost to ride a taxi for 10 miles in this city? (b) Suppose a taxi ride in another city costs 50 cents for the first of a mile, and 15 cents for each additional of a mile. Write the function that gives the total cost C(x), in cents, to ride x sevenths of a mile past the first seventh in this city. (c) Solve the two equations given in part (b) simultaneously (as a system of equations), and explain in words what your solution represents.